I agree Tom Hanks is completely miscast.
Reading the book I picured a slightly sexy ruggid type. Someone like Vigo Mortesen I think would have been good.
Hanks is a good actor, but he's wrong for this role IMO, will have to wait and see.
Plus remember this is a big blockbuster, they want a big name!!
At least Audrey Tatou will be perfect, I can't think of anyone else who could do this role!