Here's a complete recap of the Twiiter Q&A (sponsored by Verizon FiOS) with Marvel Studios President Kevin Feige. Extremis will be featured in post Iron Man 3 MCU films confirms Feige.

The Q&A [Feige took over the Iron Man twitter account] started a little slow but things picked up a bit towards the end. Extremis will turn up in one of the post Iron Man 3 Marvel Cinematic Universe films confirmed Feige. Who thinks Extremis will show up again in the form of Brandt (Stephanie Szostak) as we never saw what happened to her character? We definitely saw other Extremis soldiers survive far worse than the injury that seemingly put her down for the count.

That's a tough one to answer in 140 characters. But if we had to distill it down, it's epic storytelling with a human spirit. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

It was an idea that our co-writers Shane Black & Drew Pearce had to take Tony out of his element & away from his usual allies. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

It comes from a variety of places. The comics are our first resource & the screenplay often calls for new & original suits. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Our vis dev department led by Ryan Meinerding fleshes out the new ideas before handing off to our VFX team to bring to life #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Probably AC/DC, but the entire team here has had Blue by Eiffel 65 in our heads for the last 5 months. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Making the far-fetched seem real is the fun of film making. The suit case suit in #IronMan 2 is a great example. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Great question, @danreyes. Love Robocop, but not a fair fight. Tony would be victorious. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

We started outlining the story with Shane Black & Drew Pearce in March 2011, @missnewsboys, & then continued for almost 2 years #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Hey @sparktakussug! Because Robert doesn't like to be handed stuff. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

The Malibu house sets were among the biggest constructed in the films, @tmachytkova The exterior however only exists digitally #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

#SHIELD was very busy, as will be revealed in future films. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Yes. Guardians of the Galaxy on August 1, 2014. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Happy wore it in the comics, I think it would be cool to see that in the film. #FiOSIM3Chat — Tony Stark (@Iron_Man) May 10, 2013

Thanks for joining me for the #FiOSIM3Chat! Talk to all of you again soon. -Kevin Feige — Tony Stark (@Iron_Man) May 10, 2013

Based on Warren Ellis' Extremis storyline and following the box-office shattering events of Marvel's The Avengers, Tony Stark (Robert Downey Jr.) has become the target of global terrorist The Mandarin (Sir Ben Kingsley) who has secretly been the mastermind behind most of the tragedies in Tony's life. Isolated from his fellow Avengers, Tony will have to devise his most advanced armor yet if he hopes to save the woman he loves, Pepper Potts (Gwyneth Paltrow). Standing beside Tony as he takes on Mandarin's villainous allies and Ten Rings subordinates will be War Machine James Rhodey (Don Cheadle) who was conspicuously absent during the Chituari invasion in New York. Based on a screenplay by Shane Black (Lethal Weapon, Kiss Kiss Bang Bang) and Drew Pearce (Godzilla, Sherlock Holmes 3).

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2 hr 10 min (confirmed)May 3, 2013PG-13 (confirmed)Robert Downey Jr, Ben Kingsley, Gwyneth Paltrow, Rebecca Hall, Don Cheadle, William Sadler, James Badge Dale, Yvonne Zima, Stephanie SzostakShane BlackShane Black (screenplay) Drew Pearce (screenplay) Stan Lee (comic book) Jack Kirby (comic book) Don Heck (comic book) Larry Lieber(comic book)