Earlier today, TV Guide: had 10 questions for Zachary Levi. One brought up the question:
"Was it a little bittersweet getting these back six episodes since you had to turn down your role in Thor?"
He replied: " Yeah, that was a bummer. There's no way to slice it. I am Chuck Bartowski in a lot of ways, so to be able to not only be up for a really big movie, but to be up for a really big movie that is a part of the Marvel Universe, that Kenneth Branagh is directing, that Natalie Portman and Anthony Hopkins are in, you dream about stuff like that. It sucked having to let that go, but again, that stuff is out of your hands. I believe that, based on what's happened, this is where God wants me so you let that go. I wish them nothing but the best. I'm sure Stuart Townsend will do a good job. Hopefully Marvel feels bad and are like. 'You should be Captain America!' or Bucky at the very least. It definitely was tough to let that go."
Zachary Levi would have been kind of strange as Fandral, considering Zachary is a little taller than Chris Hemsworth, who is playing Thor. I'm sure they can find a role for him in "The First Avenger: Captain America."