Ok, cool. I was gonna suggest this, too.
I think we should clarify that this just pertains to what Marvel Studios is doing, since all the properties at other studios are isolated in their own little worlds. That rules out Fantastic Four, Ghost Rider, Daredevil, Elektra, Spider-Man, and the X-Men.
It's not that I'm not interested in stuff like, say, a gonzo Neveldine/Taylor Ghost Rider picture or Bryan Singer's proposal for a string of X-films in period settings, it's just that those definitely belong to conversations separate from what Feige and the other producers at Marvel are planning.
The films so far, either released or announced (with dates
The Incredible Hulk
Iron Man 2
Captain America: The First Avenger
Iron Man 3
I think we can probably take it as a given that they'll have, at minimum, two movies per year, probably starting in 2012. Edgar Wright's Ant-Man is probably
next closest to the green light, since they just got that second draft in (and Wright's got a free schedule to do it, as far as anybody knows.) They could plausibly shoot it for release post-Avengers in summer 2012 (and if they were quick enough, Avengers could get a Hank Pym cameo.)
Recent quote from Feige:
Thor will go off into a new adventure, and Captain America will continue to explore the modern world in another film of his own. We hope that holds true for the characters appearing in that film – Black Widow, Hawkeye, and the spy organization, S.H.I.E.L.D. – all of whom are more than worthy and capable of carrying their own films. And, we’ve got a lot of other characters we’re prepping and getting ready for film debuts: the world of martial arts, these great cosmic space fantasies, Dr. Strange, and the magic side of the Marvel Universe. There are many, many stories to be mined.
I think you're far more likely to see Black Widow and Hawkeye in supporting roles in a SHIELD movie with Nick Fury than in solo spinoffs. "The world of martial arts" refers to Iron Fist, which Feige's mentioned by name before (with particular fondness for the recent Ed Brubaker run.) Dr. Strange is in development. "Cosmic space fantasies" refers to the Guardians of the Galaxy or the Inhumans (or both.)
Not mentioned in that quote, but Black Panther has a writer, too.
Off the top of my head here, the list of stuff "To Be Announced" probably looks like:
Guardians of the Galaxy
Thor 2, 3
Captain America 2, 3
Avengers 2, 3
...and maybe another Hulk movie as a dark horse candidate, but I have no idea what their Hulk plans are right now.
Going strictly by what Feige's mentioned by name, I supposed you could also consider Werewolf by Night (seriously) and Shang Chi as possibilities. I think he stopped talking about Shang Chi and switched to Iron Fist when Marvel got Luke Cage back. Everyone assumes a War Machine spinoff's coming at some point, but they don't seem to be in a hurry about that.
Big question: when are they moving up to 3+ movies a year, as they've said they want to? I'd assume that means their usual two summer movies plus something dropped elsewhere in the year--something with a lower budget in March or April (the 300
zone. I could see them putting something like Iron Fist here) or something during the holiday season (it's plausible that a Marvel movie could soon wind up being Disney's big holiday release (think Tron: Legacy last year.)
Big question: if "Avengers Assemble" is their first crossover "story," is there another one coming? Is that the Kree-Skrull War? What do we make of the Infinity Gauntlet they displayed at Comic-Con? They'd have plenty of time to get to Thanos for Avengers #3, setting it up piece by piece (Dr. Strange could encounter Death while astral projecting, for example.)
I think we can probably expect to see more Captain America and/or Thor by the end of 2014. I'd expect them to hold off on Avengers 2 until at least 2015, probably no later than 2016.