Okay, so this first part was mostly set-up and exposition, but a few things stood out for me.

• Wow, that's a lot of Avenggers! I recognized most of them at least by name, but a few were totally new to me. Living Lightning? Sersi? Moondragon? Starfox? How am I supposed to keep track of all these people? And hey, no one ever told me there was an oceanographer superhero! Cool!
  
  
• I liked seeing some of the more obscure Avengers fighting in the prologue. It gave a sense of how wide-spread the attack was, that it wasn't just the big guns being attacked.
  
  
• The tea-drinking scene: Hank apparently has a special giant-sized tea cup made just for him. Are there giant forks and spoons in the mansion's silverware drawer, too? Do they have little thimble-sized cups set aside for Ant-Man? Also, Steve has a little tea towel draped over his leg while he drinks his tea. How cute is that?
  
  
• Wasn't I lamenting just the other day about Tony and his control-freak tendencies? Here he's getting all snippy because he apparently thinks that he should've somehow known in advance about the attacks. And somehow stopped the Avengers from being disbanded. Uh, Tony, you were in another universe and presumed dead. Give yourself a break, man.
  
  
• Steve, of course, wants Tony to calm down and focus on the current problem. Steve is a tactical thinker rather than a strategic one, which makes sense given his background.
  
  
• Carol is Binary here, huh? I don't think I've read anything with her as Binary before.
  
  
• I don't care for Thor with a beard, it makes him look old and scruffy. *is shallow*
  

Overall, this is definitely fun so far. And the art is so pretty and shiny!