It's a game where you go around in the theme park and "ride" the rides. Ie. On the Jaws ride you kill Jaws, etc. It's kinda like those Namco classics series games I think.
It sadly seems a little TOO kiddie aimed. I'm a theme park nut, more so if you combine movies with theme parks, so natrually this title had me curious.
What I've seen of it, the walking round the park stuff looks great, but the actual mini-games based on the movies look very lacking and generic. Have IGN not reviewed it yet? They have a preview page on it.
IGN has specified that they will not be reviewing Universal, Simpsons, or the football game that just came out until January. They did give initial word that prior build versions of each game did not impress them. I'll hold off. There are too many good games to be had between my gamecube and GBA to waste time on bad ones.