A major victory had been achieved in the Autobot/Decepticon war. Megatron had been defeated, and the Allspark restored. However, not all Autobots were celebrating...

"I can't believe that washout beat Megatron AGAIN! How does he do that? I'm acting Magnus, I should be the one recieving credit for this victory! Instead, HE'S getting all the credit!" Sentinel Prime, acting Magnus, paced around his chambers, awaiting the news on Ultra Magnus' condition. It was said that he would recieve the news today if Ultra Magnus would survive or not, but he was getting impatient, as he often does.
"Sentinel Prime?" A small yellow and black 'bot with two wheels over his shoulders walked in.
"WHAT IS IT, AUTOBOT? I'M IN NO MOOD FOR ANY SERVO BOOSTING CHIPS, SO - Oh, it's just you, Rapid Run." The smaller 'bot, with a mischievous grin on his face, snarkily stated,
"Oh, it ain't much, boss, but the Autobot High Council wants to see you about your position."
"Oh. Then I'll meet them as soon as possible."
Rapid Run saluted, and stood there with an expecting look on his faceplate.
"What do you want, Autobot? Payment? All the payment you need is the fact you're one of our finest messengers." Rapid Run stood there, still waiting.
"GET OUT OF HERE, NOW!" At this, Rapid Run transformed into his motorcycle mode and zoomed on out.

"Autobot High Council, arise." The members of the Autobot High Council, which included such various members as Civilian Guildmaster Alpha Trion, Minister of Science Perceptor, Cyber-Ninja Corps Sensei Star Saber, and Head of Cybertron Intelligence Cliffjumper, watched as three figures strode into the center of the chamber. One was primarily red, with blue legs. This was Optimus Prime, Cybertron's newest hero. Another was maroon and orange, and was obviously recovering from a bad case of Cosmic Rust. This was Rodimus Prime. Finally, fashionably late as always, a blue Cybertronian bulldozer with an orange plow motored in, revving his engine as loud as he could. This was Sentinel Prime.
"You three are the best and brightest of the Primes; the proudest and strongest of the Autobots," Alpha Trion stated, "And now, we believe it is time to reveal the fate of Ultra Magnus." Then, picking up from where Alpha Trion left off, Perceptor continued.
"The wounds to Ultra Magnus' frame and spark are too extensive to repair. We are afraid that we have no choice but to take him off of spark support, and let him go offline in his stasis sleep. This means one of you has been selected to be Magnus." The three Primes stood up taller, awaiting the verdict as the High Council members all talked to each other. Finally, Alpha Trion delivered the decision.
"Optimus Prime... You are the new Magnus. For your bravery and heroic deeds, we have unanimously decided to put our faith in you. Carry the title of Magnus with honor and dignity." Optimus stood there, stunned, as his old friend Rodimus smiled and patted him on the back.
"Great going, old pal. I always knew you could do it." Optimus was taken out of silence, and started a thank you speech.

"Thank you, all of you. This position means so much to me, and I never could have gotten here without the help of my team. I'm not Cybertron's sole hero, and I think that my team should also be given credi-"
"WHAT IN THE SPARK IS THIS SLAG?! HAVEN'T I BEEN A GREAT ACTING MAGNUS?! I'M TWICE THE 'BOT THAT OPTIMUS IS! THIS IS INSANE!" Sentinel, smoke fuming out of the pipes on his head, then drew his lance and shield, striking Optimus down with one blow to the spark chamber as everyone in the room watched in horror. Rodimus drew his bow, and shot two electirc arrows into Sentinel's back, paralyzing him, as Optimus, struggling with the gaping wound in his chestplate, writhed in pain. The Autotroopers rushed into the room, slapping stasis cuffs on the raging Sentinel and dragging him away. Optimus' vision blacked out, as he was carried away by a team of paramedic drones...

"Optimus... Wake up, slaggit, wake up!" Ratchet then slammed a pair of spark defibrillators into his old friend, as Optimus laid silently, his optics dimming. To his side, a tall scrubs green and white robot spoke in a mechanical monotone.
"Observation: Optimus is in spark arrest. There's no telling if he'll be able to survive..." As Lifeline spoke these words, Optimus' body started to turn gray.
"No... NOOOOOO!" Ratchet said, a single drop of wiper fluid falling from his optic, as he kept trying to restart Optimus' spark...

"Where... Where am I?" Optimus was floating in a realm, unhindered by gravity.
"Am I... Offline?"
"For now, you are." Optimus turned around at the familiar voice.
"No, It can't be... Prowl?" Optimus saw his deceased friend, clad in his samurai armor and his master's helmet.
"Now I know I'm offline... Did Sentinel really just-?"
"Yes, he did. Hardly surprising, really. But Cybertron needs you more than ever, Optimus. I've seen things. A new Decepticon leader has risen, far more ruthless than even Megatron. The galaxy needs you. You must tell them. Warn them of him."
"Warn them of who?" Prowl started to fade, and Optimus could feel the pull of gravity returning as Ratchet's spark defibrillators did their job.
"His name... is Scourge..."

"PROWL!" Optimus shouted, startling Ratchet and Lifeline.
"Query: This is what more religious Cybertronians would call miracles, yes?" Ratchet turned to the younger medic, with a stunned expression on your face.
"Almost as miraculous as you gaining a spark without the power of the Allspark, kid." Optimus looked up.
"I have to warn all of you. The Decepticons are preparing for another attack, with a new leader. His name is Scourge." Ratchet shook his head.
"No time for worrying about that right now. The High Council just named Rodimus Acting Magnus while you're, erm... Incapacitated." Optimus mustered up a weak smile.
"At least this time, they put that power in the correct servos."

"No... I'm not a traitor... Optimus is! This is all HIS fault!" Sentinel, now stripped of his rank and forced into solitary confinement on an asteroid base without his weapons and stasis-cuffed on both hands and feet, waited for his daily serving of crankcase oil and low-grade energon. The serving bot slipped up to the window, placing the meager meal through the slot. It was Rapid Run, with a smug smirk plastered across his faceplate.
"Yo, Sentinel Major Disaster, here's your meal." Rapid Run guffawed, watching as robot arms forced the meal into Sentinel's faceplate, missing his energy port by a foot and splattering the oil and energon over his facplate. Sentinel just glared angrily at the little jerk, thinking of ways he could be busted out.
"I know what yer thinkin', Sarge-bot. You wanna be busted out, right? Well, I can probably help you with that. If you don't tell anyobody my secret." Sentinel's angry look changed to a puzzled one
"What the slag are you talking about, Auto...Bot?"

Sentinel watched as Rapid Run became purple and gold, his legs fusing into one uni-wheel, the wheels over his shoulders fusing into one wheel arranged sideways behind his back, and his optics turned red as a Decepticon insignia appeared on his right forearm.
"WHAT THE SLAG IS GOING ON HERE?" The Decepticon smirked.
"I thought ya'd never ask, Autobyte. Name's Sideways, Decepticon spy and assassin. And you, my pal, have jus' made some friends in high places, if ya keep this little secret o' mine." An Autotrooper walked in, hearing Sentinel's yelling, and seeing the Decepticon, rushed at him, only to be stabbed by Sideway's cybervenom-laced knife! As the deadly cyber-venom took effect, Sideways turned to Sentinel, an evil smile on his faceplate.
"Heh. I'll call in the rest of my team, and we'll bust ya out... Provided ya tell da boss all ya learned when youse was acting Magnus. Capisce?" Sentinel paused for a moment, before shaking his head.
"I'D NEVER WORK WITH A BUNCH OF DECEPTICONS!"
"I don't think ya quite understand this, dumbaft. This is a DEMAND, not a request, and it comes from the Big 'Bot himself. I'd suggest that ya shut yer speech synth, or else." Sideways smirked, and pressed the Decepticon insignia on his arm, summoning his teammates to attack the stockade and take Sentinel...

Whoa, NICE! I always had a feeling Sentinel would lose it someday, and boy oh boy, did he ever go ballisitic!

Nat bad. I'm thanking that Sentinel could become Scourge...

Nope. Scourge was around waaaay before Sentinel, or even Megatron and Ultra Magnus. As a matter of fact, Scourge was one of the first under the Fallen to change from Autobot to Decepticon. HIGHLIGHT to view:
His Autobot name was Nova Prime.

Whoooaaaa..........

Everyone seems to be seizing on this idea of Sentinel losing it and going to the dark side.

And why not, its just too much fun.

Technically speaking, you should clean that up a bit. Maybe its changed, but when I was being taught how to write, when a new character starts talking, he gets a new paragraph, even if it means several one line paragraphs. Perhaps juggling the words around to improve flow. And watch out for overuse of terms, like "best" in the speech.

Overall though, I enjoyed it quite a bit and look forward to more. Helps that I am an RiD fan, too.

I'm intrigued to see where this is going. The start certainly hooked me.