A Sound of Thunder trailer

Sci Fi Wire has links to "A Sound of Thunder trailer. The movie, starring Ed Burns and Ben Kingsley, is based on the short story by Ray Bradbury. It's about a team of hunters who go back in time for a dinosaur hunt. But they make the error of stepping on a butterfly and changing everything. That's where the story ends. The movie seems to go on and have the hunters try to change the world back to the way it was.
I hope they do a good job with this. The monsters and city destruction looks impressive, I just wonder if the plot will hold up after they leave Bradbury's territory.
By the way, I remember a good version of that story on TV. It must have been on Ray Bradbury Theater. Good stuff.