Thank you very much Jalaguy for the translation, I am in your debt. As for the canonicity of said text, Thylacine 2000 is likely correct in his assessment that most of it is non canon until further notice. That being said, the fates of Prime and Megatron (Galvatron?) are so ambiguous that at least some of the text could be considered as an alternate perspective (precious few still live who know the real truth, so who's to say the developers are wrong?)
Megatron is almost certainly dead, for he was being immitated by Flamewar in The Razor's Edge, and Cyclonus vaguely mentioned that Galvatron had failed the Decepticon cause. This would jive pretty well with the developer comments, as Megatron dying or vanishing around the time of the Pax Cybertronia would explain the rapid decline of the Decepticon Empire (and subsequent rise of the Predacons under Razorclaw).
EDIT: This explanation also jives with Wings Universe lore fairly well, considering Galvatron was critically injured just before the Machine Wars and subsequent signing of the Pax Cybertronia. It's plausible he could have died shortly afterwards and was remembered as Megatron by history (like how Augustus Caesar is commonly remembered as simply Octavian). Flamewar could've then used the myth of his survival to rally supporters to her band of rogue Decepticons and Predacons.
Prime is much trickier, because Reaching the Omega Point depicted him as 'alive' in J'nwan (the nature of J'nwan straddles the line between spiritual and physical, so even that is ambiguous). That being said, the events of Reaching tbe Omega Point were set almost exclusively in the Marvel Comics version of Beasts Wars, where as nearly all other Beast Era fiction used the G1 cartoon as it's history (case and point being the Wreckers). Further compounding the issue is that the timeline said Optimus was from got subsequently erased from the Multiverse, leaving him stranded in parts unknown after escaping through a time portal.
Shifting back to the more cartoon oriented fiction, the Beast Machines episode 'The Search' implies Prime died, but said implication was given by Megatron in a ruse to fool Primal, so the legitimacy of his claim is very dubious. Then, in the Wreckers, Arcee flat out says that Prime is dead and that Rodimus is with him now. However, her claim is also dubious, as Rodimus wasn't Autobot leader by the Great War's end (who else besides him would assume leadership if Prime had died?), and she had locked herself underground in exile for centuries, growing more than a little crazy. So then, how legitimate is her claim? More legitimate than Megatron's, but that isn't saying much.
Given the contradictory and extremely dubious circumstances, I think it's fair for one to choose the space explorer answer for Prime. Besides, who here really wants to hear that Prime up and died again right before Cybertron achieved peace? That's just depressing and leaves nobody happy, and also invalidates his multiple revivals in both the Marvel Comics and G1 cartoon (depending on which continuity you choose to be the past of the Beast Era, if any continuity at all).
Edited by That ONE Guy, 23 December 2018 - 07:13 PM.