I went over to Newsarama and found out that Doctor Strange is going to be a member of the All-New Avengers. At first, it may come to a shock, but I can accept him as an Avenger. So far, here's the list of who's going to be on all four major teams:

New Avengers:
Echo
Ronin (possibly Cap or Hawkeye)
Doctor Strange
plus five others (my bets being Cap or Hawkeye, Wolverine, Spider-Man, Spider-Woman, and Luke Cage)

Mighty Avengers:
Iron Man
Wasp
Black Widow
Wonder Man
Ms. Marvel
Sentry
Ares
and maybe one more (my guess would be Yellowjacket)

Young Avengers:
Patriot
Wiccan
Hulkling
Hawkeye (maybe Clint took the Ronin identity)
Stature
Vision
Speed

Fantastic Four:
Thing
She-Hulk
Storm
Black Panther

What does everyone think?