Chicken Little is Disney, which makes sure that it'll suck ass, but still be critically acclaimed by critics and merchandise whores. Therefore, if it merely sucks, it's better than we hoped for.
War of the Worlds has Tom Cruise in it- aka it's another movie that comes out ahead if it merely sucks, because cruise has a habit of picking movies that would have sucked with a GOOD actor... is this not the same Tom Cruise who starred in MI:2 and Minority Report? The same Cruise who's currently porking Miss Katie "looks like a whorehouse lampshade on the cover of all this month's mags" Holmes? The only appeal with cruise is figuring out how he can stick his dick in Katie Holmes. Then you figure out that you're thinking way too much about Katie Holmes' vagina and leave to wash it out of your mind with the purer image of Jill Kelly's.
Rebound looks like a popcorn flick- bad, but secretly enjoyable because you don't have to think about it. Kind of like the first Tomb Raider or Charlie's Angels... the movie sucks, but it's good for when you don't want something with any intelligence whatsover. Most live-action family movies fall into this.
Fantastic Four has Jessica Alba and Micheal Chiklis is the Thing, which means it has at least two talented actors, but not much else from what I've seen. Sadly, from what I'm seeing, it's still got the potential to be the most watchable of all of these, despite the horrible SFX, campy story, and watching the two afforementioned talented actors try to carry terrible acting by whoever the hell's playing Mr. Fantastic, Human Tortch, and most especially Dr. Doom.