Despite previous issues contradicting Earth-120185. I thought ReGen One exclusively occurred on Earth-91274. Then again, Earth-91274 did show a brief flashback to the Firebug story, so it's likely that the Firebug story did also occur on Earth-91274 (but not other events from Earth-120185 such as the Time Wars etc.). That's what I assumed anyway.
Yeah, it was interesting seeing Buster grown up and married to Jessie, as well as the events leading up to Megatron's Decepti-Zombie Apocalypse. It also answers the question as to what the hell Fortress Maximus was doing... although not a terribly awesome answer; I was hoping to see Fort Max go down in a blaze of glory (forcing Spike to abandon him and Cerebros; maybe Fort Max would've ejected him to save his life). Meh.
Is that what it was? Cos that scene did feel a bit weird for me, but I assumed that what Jhiaxus destroyed was merely an avatar of Boltax, but not Boltax himself since Boltax himself is the entire temple itself (though Jhiaxus and the others may not have known that since it was a guarded secret). But then again, ReGen One is supposedly ignoring G2 continuity so... AAAARGH!!!
The use of different artists for the various mini-arcs was interesting.
I'm also not entirely pleased that they've decided to 'reset' the issue counts at #0. I've quite enjoyed how ReGen One continued the count from where G1 ended... I hope it's just for this issue and the next issue isn't going to be #1. :/