According to sources speaking to CHUD, actor/screenwriter Justin Theroux is being eyed for the part, though he could be one of a handful (or this could be completely erroneous). While it might seem mega early to cast the part, one wonders if they are looking to tease the character in an upcoming post-credits Marvel movie sequence or perhaps in the forthcoming "Agents Of S.H.I.E.L.D." At any rate, Theroux does have some history with the comics giant, having penned "Iron Man 2." Marvel does have a script in their hands courtesy of Thomas Donnelly and Joshua Oppenheimer ("Conan The Barbarian," "Sahara") who handed something in way back in 2011, but no word if it will be getting a rewrite. Nor has there been any director assigned to the movie either.
So, in short we'll see. But he'd be an interesting choice if somehow this pans out, with the actor more than capable of bringing the sense of grandeur the part would likely require.