Hey folks, Ain't-It-Cool-News is reporting that Matthias Schweighöfer is in running for THOR, but he also mentions Robert & Jude. Here is what the article stated:
According to actor, Matthias Schweighöfer, who you may have seen in VALKYRIE or RED BARON - in an article in the German edition of Gentlemen's Quarterly aka GQ, he states that he's in the running for a role in Branagh's THOR, but he also mentions that Jude Law and Robert DeNiro have joined the cast.
There isn't another source yet, so I don't know how you guys should take this. I'll do more research.