As Marvel ramps up its big promotional campaign for Iron Man 3, we’re beginning to see more and more details of Tony Stark’s latest adventure leak to the Internet.

The Iron Man 3 teaser trailer and Super Bowl trailer framed a story in which Tony Stark (Robert Downey Jr.) is busy dealing with the ramifications of The Avengers when he is ambushed on his very doorstep by the forces of the maniacal Mandarin (Ben Kingsley). We’re left with an image of Tony, bruised and battered, trying to make his way through a dark, frozen terrain with armor in tow.

In the weeks since that initial bleak picture was painted, we’ve learned more and more unconfirmed details of the film’s plot – which means at this point you should be aware that POSSIBLE SPOILERS FOR IRON MAN 3 FOLLOW!!!

Since the beginning, it has been assumed that director Shane Black and co-writer Drew Pearce would be drawing from the “Extremis” storylines featured in mid-to-late 2000s Iron Man comics, in which Tony Stark is transformed by a weaponized nano-tech virus into a sort of living computer, able to mentally control (and later manifest) his armor. At one point the Mandarin attempted to unleash this high-fatality-rate virus on an unsuspecting world populace, only to be thwarted by Iron Man.

Characters derived from the comics – like Aldrich Killian (Guy Pearce) and Maya Hansen (Rebecca Hall) – are definite clues that “Extremis” DNA exists in Iron Man 3, but the film (being a Marvel blockbuster and all) needed some bigger pieces to work with – and for some time now word has been that the big finish would involve Tony using his new Extremis abilities and Mark 47 armor to control his own army of Iron Man suits – now dubbed “The Iron Legion.”

Well, this new Iron Man 3 poster – snapped at an unknown location and posted to I Heart Cupcakes – reveals that the Iron Legion is indeed real, and that the big showdown between Tony and the Mandarin is definitely more than just idle speculation. Check out a snapshot of the poster:

CLICK IMAGE FOR FULL SIZE

Looks pretty official, no?

UPDATE: IT’S OFFICIAL (CLICK FOR HI-RES)

There’s a long list of Iron Man armors we want to see in these Marvel movies, and if the jump from the Mark 7 armor in Avengers to the Mark 47 armor we’ll see in IM3 is any indication, we’ll probably see quite a few of our favorites (and some other iconic designs) included in this “Iron Legion.” (By the way, if you haven’t seen it already, check out concept art for the Hulkbuster and Deep-Space armors we may see in the film.)

We know this unofficial version of the one-sheet above is hard to dissect – but any guesses which armors are featured in the poster? And how do you like the look of Tony’s “Extremis effect?”

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Iron Man 3 will be in theaters on May 3, 2013.

Source: I Heart Cupcakes (via Bleeding Cool), Yahoo! Movies