Everything is revealed, everything is explained... 
 I enjoyed this. Lots of action, I liked the art, and I'm happy with the resolution. It's not my favourite thing that Gillen has written, and out of the three volumes I preferred the first one, but it was still good and pretty smart, now that I think about it. It wasn't so much about the "retcon" than about Tony Stark's reaction to it, and that was great. 
 I'd love to read Tony's adventures with the Guardians of the Galaxy though, it might be one of the next things I pick up !