From what I have seen, Orm is like Loki right? I think they need a charismatic actor, especially if they are going for the difference in size, a la Thor/Loki.
That being said, I hope they get Keanu somehow somewhere. Also I would love Eddie Redmayne in something as well
A couple things on the senate scene: When they have cut out the scene of him sad in the fire? I mean, if he's going to save people then he should do it right away. And shouldn't the bodies be more burnt up or damaged? I think that was the Senator he was carrying? It was a pretty big blast. But yea, they should have left it in there, instead of the sad fire scene that people just made fun of.