Why We Can't Wait to See It: It's a fresh, yet classic stoner story written by Seth Rogen, Judd Apatow, and Evan Goldberg. The trailer looks funnier than hell, there's 227 references, and Huey frickin' Lewis wrote the theme song. Also, Rogen gets to not only fly through the air, but also carry James Franco out of a burning building all action hero-style.
Why It Might Do Well: Between The 40 Year Old Virgin, Knocked Up, and Superbad, Seth Rogen has been comedy gold lately. At the very least, the movie will get the loyal Judd Apatow contingent, along with those curious to see what David Gordon Green can do with comedy.
Why It Might Not Do Well: Aliens land on earth and the world ends. Realistically, it should do quite well, but it won't get as many young girls and action-hungry mens seeing it -- both Sisterhood of the Traveling Pants 2 and Hell Ride open on the same day.
Fun Fact: The chorus of Huey Lewis' theme song for the film: "We got in trouble, we got to get out of here. I've got you, you've got me. We are as high as we can be. That's all right. How did we get into this mess? Pineapple Express!"