Thor Also Says, "I Am An Avenger"

Looks like Marvel's not letting up with their "I Am An Avenger" promos.  So far we know Bucky, Spider-Woman, Iron Man and Hawkeye are on the team.  Today they've announced another: 

Yes, there you have it.  Odin's favorite son, Thor, will once again become an Avenger.  This is quite the team we're getting.  Some pretty big hitters.  That's what makes the most sense.  If you're going to put together a team of heroes to defend the helpless, you don't get a bunch of dorks on the team.  You get the biggest guns you can rally together. 
 
What this means for SIEGE is (especially if you haven't read issue #2 yet), we know Thor will be surviving.  Although was there really any doubt that he'd make it through the series? 
 
One thing that I do wonder, are all these characters going to be on the same team?  It seems a little weird, to me, that Marvel would cancel New, Dark and Mighty Avengers and come back with just one title (we know Avengers Initiative is coming back as Avengers Academy).  It does almost seem like there are too many heavy hitters on the same team.  Would that make it harder to write the team fighting the bad guys if their roster is an unstoppable force?  Are we going to see other branches of the Avengers like West Coast, etc?