Didn't Bombshell refer to him as Sunstorm though, before Arcee killed him? I think he did but cant fully remember and the comic is at home. I would have loved to see Sunstorm set up a 'Church of Primus' on this new Cybertron and stand out the front yelling at bots to repent and handing out data tracks of the covenant of Primus
I dunno, maybe Sunstorm survived, considering Rung got shot in the head and is alive as well as Red Alert being decapitated and still surviving

but I wouldn't put too much faith in that shot. I'm pretty sure you can see one of the Relfector trio as well and they are meant to be dead like twice over now

Continuity alert!
EDIT: Forget all that! I just read the notice with the pic on Siebertron. This tale is back when Megatron was first resurrected by Shockwave and Soundwave on that asteroid, just after he blew Hot Rod into space. Continuity saved 