Iron Man Screenwriters Writing Mystery Marvel Film?

I got a little confused when it was announced Justin Theroux would be writing Iron Man 2, considering the fact Iron Man was a critical and financial success. You would have thought Marvel would be keen to get writers Mark Fergus and Hawk Ostby back. Instead they hired Robert Downey Jr’s friend and Tropic Thunder writer, Justin Theroux. Well now things seem to be making sense, after Mark Fergus revealed some interesting info to MTV:

“There are some really juicy [movies] that we are very much talking intensely with Marvel about. We’re like, ‘We’re the right guys for this one,’” Fergus revealed, remaining maddeningly coy on which particular movie that was. “We’re interested in working on a bunch of these other Marvel projections and everything in the Marvel canon is fair game. We have a lot of ideas about all this, but until they officially ask us to come do one of these we’ll keep our mouths closed about the actual ideas. It’s moving along nicely but nothing official yet. But, yes, we are planning on working on some of those movies. That much I’ll say.”

Captain America? The Avengers? What could Marvel be lining up for them? Interesting indeed…