The Front-Runner

Why He's Possible: He's already been tipped in the lead role, Branagh seems to be favouring him and he really does look the part.

Plus his dad is Stellan Skarsgard and if Marvel hires Alexander, chances are they might convince Stellan to play his character's Dad, Odin. Score!

Why he might not nab the role: He's becoming a bit more well known to US audiences thanks to roles in HBO series Generation Kill and True Blood, which could leave him in the twilight zone between "too well known" and "not enough of a name."

But we doubt it - consider him a clear leader for the role.