MTV got a chance to talk Kenneth Branagh, in which he confirmed that he is directing Thor for Marvel. He had this to say about why he chose to make the film and casting:
So what’s the appeal of “Thor,” Kenneth? “To work on a story about one of the immortals, Gods, extraordinary beings, inter-dimensional creatures,” he enthused.
He continued excitedly, “There’s science fiction and science fact and fantasy all woven into one. It’s based on Norse legends which Marvel sort of raided in a brilliant way.
“There’s been lots of talk [about casting] — I sound like a politician — but we are too early at this stage. We’re getting the story and the visual effects together and all of that is very exciting. Someone sensational is going to play the part but it is early days.”
“It’s a chance to tell a big story on a big scale,” said Branagh. “It’s a human story right in the center of a big epic scenario.”