I also want a Gigastorm, but that's less due to my Trypticon being damaged (thankfully not the case, but you have my condolences) and more because I like the idea of them doing one and would happily snap it up. BWII was beyond my ability to get, so modern updates for it are welcome.
Honestly, I'd be shocked if RotF Skids and Mudflap ever got toys as part of the Studio Series line. And I have rather mixed feelings about that.
Seriously, the two were hardly popular characters, but God knows that we could get better toys for them.
Okay, I'm gonna step back from my debate here. Instead, I'm gonna speculate. Now, don't expect me to do anything really deep, as these are probably very obvious bits of speculation, but I'm gonna put them out anyway.
Well, preorders are split yet again thanks to me being at work when they went active. Nucleous and Vector Prime are preordered at BBTS, while Cybertron Hot Shot and RiD Sideburn (I'm weak! I'm weak!) will be coming from Hasbro Pulse.