Harry Potter in ScarFace II (say hello to my little wand)
Dances With Wolves II (Stands With Fist Learns the Fox Trot)
True Truths
Guess Whose Coming to Breakfast
Supersize II (The Revenge of Jenny Craig)
Slumdog Trillionaire
The Winds of War II (The Bush Years)
if you go to Hulu you can watch a pretty funny clip from Saturday Night Live, a spoof on the "The fast and the furious" with a gay theme called "the fast and the curious"
Waterworld II: We Didn't Lose Enough Money the First Time
Wall Street II: The Bailout
Any Star Trek movie where the guy in the red shirt doesn't die in the first 15 minutes
There Will Be Blood II: There Will be Phlegm
Close Encounters of the Fourth Kind: Alien Porn!!
The Pursuit of Crappyness: after the crash, a riches to rags story
Independence Night: The second wave
I am Bludgeoned (sequel to "I am Legend" - same story but from the zombies perspective.)