Just picked up the latest issue... it answers some more questions (but still not all). So we now know:
+ What happened to Earth
+ Where Bludgeon and his crew are
+ What happened to Thunderwing

The issue also reveals the true identity of Circuit Smasher, which I totally did _not_ see coming! Nice surprise there! The only slightly sad thing about this issue is that it does very conclusive rule G2 out of continuity with this series (aww, I was hoping they'd include it or leave it ambiguous... yeah, I know Furman did say from the outset that he was going to ignore G2. )