Marvel Studios PresidentKevin Feigetook to Twitter Friday morning, as @Iron_Man, to answer some fan questions aboutIron Man 3, which is currently in theaters. Most of them were the usual fan questions (“Who would win in a fight, Iron Man or RoboCop”) but he did give some insight into the upcoming films too.

For example, Feige said that we would see Extremis again in future films. He also said the reason S.H.I.E.L.D. couldn’t help Tony Stark inIron Man 3is because they were very busy, as will be revealed in future films, an obvious reference toCaptain America: The Winter Soldier.

Here are the pertinent tweets, and answers, from Feige, followed by some speculation.Click herefor the full chat.

Was the@Iron_Manmalibu house ever built?#FiOSIM3Chat#IronMan3

— Tereza M. Rivers (@TMachytkova)June 01, 2025

The Malibu house sets were among the biggest constructed in the films,@TMachytkovaThe exterior however only exists digitally#FiOSIM3Chat

— Iron Man (@Iron_Man)August 19, 2025

#SHIELDwas very busy, as will be revealed in future films.#FiOSIM3Chat

Happy wore it in the comics, I think it would be cool to see that in the film.#FiOSIM3Chat

Yes.#FiOSIM3Chat

The three highlights here, of course, are Happy in the suit, more Extremis and S.H.I.E.L.D. Let’s discuss each.

Happy possibly donning the suit could work two fold, either in a comic way, or giving the character a superhuman twist. In the comics, Happy Hogan eventually is mutated into The Freak and though he doesn’t wear the suit, maybe it serves as a bridge to that. Sort of Happy getting power hungry or a physical aid before he’s mutated. AIron Man 4subplot? Perhaps, but we know that’s a long way off for several reasons.

A return of Extremis seems like a no-brainer, simply because Tony Stark is such a tech geek and how could the character resist further exploring this technology? Whether or not we’ll see this inThe Avengers 2, a fourthIron Manor maybe as a subplot in another film is certainly up for discussion. But knowing it’ll return is a nice hint moving ahead.

Finally, S.H.I.E.L.D. being busy is a reference toCaptain America: The Winter Soldier, which has a strong S.H.I.E.L.D. central plot featuring Nick Fury, Black Widow and Maria Hill. Feige’s quote suggests, though, that these two films are happening at the same time. Does that meanThor: The Dark Worldis happening at the same time too?Guardians of the Galaxy? And how doesAgents of S.H.I.E.L.D. fit in?