Marvel is keeping the Internet busy with future blockbuster talk. Hot on the heels of go-to Marvel scribe Zak Penn talking his work (or maybe lack there-of) on the current Avengers script, go-to Marvel producer Kevin Feige is talking up potential sequels for yet to be released summer 2011 blockbusters.

If Marvel’s summer line-up succeeds at the box-office, expect the comic-publisher turned film-studio to release the rumored Captain America and Thor sequels in the not-too-distant future.

Speaking with D23: The Official Disney Fan Club, Feige again confirmed rumors that work on Captain America and Thor sequels was already underway – this time clarifying that Steve Rogers would leave the WWII origin setting in favor of the present day and that Thor 2 would see the titular character “go-off” on a new adventure (though that could just be a generalized way of saying, “we don’t know exactly where but it’ll be exciting”).

Here’s the specific 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.”

The producer goes-on to address his hopes for other Avenger characters in their own films – hinting, for the first time, that Hawkeye could get his own feature:

“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.”

This isn’t the first time that we’ve heard talk of a Dr. Strange film recently either – with actor Patrick Dempsey talking up his interest in the project.

That said, the summer of 2011 is setting-up to be a major test for the marketability of multiple superhero blockbusters arriving in rapid succession – with Thor, X-Men: First Class, Green Lantern, and Captain America: The First Avenger opening within weeks of one another. Undoubtedly, the films will all pull in a lot of money; however, given the high-production costs associated with an epic superhero tale, it’s reasonable to think that not every one of them is going to catch the same fire (and subsequent net profits) as prior genre-successes such as The Dark Knight and Iron Man.

Which begs the question: where will Marvel (and other comic-adaptation producers) draw the line between what characters are feature-film-worthy and which ones can only serve as supporting characters in someone else’s film?

Follow me on Twitter @benkendrick and let us know what superhero sequel you most want to see.

In the meantime, Thor arrives in theaters on May 6, 2011 with Captain America: The First Avenger following on July 22, 2011.

Source: D23 [via IGN]