well, for those of you that saw Iron Man and waited til the end, you knew something big was coming. then, The Incredible Hulk had it's scene at the end, furthering rumor.
The Avengers is coming.
next Spring, Iron Man II is gonna be filming. Thor will probably be filming next year as well.
the next year, they'll be filming The First Avenger: Captain America. and The Avengers.
the possibility of an Ant-Man movie is becoming more and more slim, as is Nick Fury: Director of S.H.I.E.L.D. (luckily, we'll be seeing enough of him in Iron Man II...)
WB is finally catching on and is starting up their "lead-up to a team-up" program. Green Arrow: Escape from Supermax has the green light. Green Lantern and The Flash are being written. Batman III is about to start very soon. Superman VII (the reboot) is about to start up. Wonder Woman's still in the development phase, however...
personally, most of the casting is easy:
Superman: Brandon Routh
Batman: Christian Bale
Wonder Woman: ?
The Flash (Wally): Ryan Reynolds
Green Lantern: ?
Aquaman: Matt Damon?
Martian Manhunter: Laurence Fishburne
some "Reserve" Leaguers:
The Atom: Bill Pullman
Elongated Man: Will Ferrell?
Green Arrow: ?
Black Canary: ?
Plastic Man: Jim Carrey
Captain Marvel: ?
that's my thoughts on this insanity...