Yeah, Elizabeth Banks is one amazing-looking woman, ain't she? And I would personally run across a multi-lane freeway for Nathan Fillion. He's like a much more buff Jason Bateman. He also does that same dry-wit delivery thing he does as Mal in "Firefly" in this one.
The director/writer, James Gunn, is working on this:
http://www.imdb.com/title/tt1082807/ currently. He's got an interesting background, having worked on such things as "Tromeo and Juliet" and "The Tromaville Cafe". I'll excuse him the two "Scooby Doo" offerings listed on his imdb page.