Most Disappointing Sequel?

Matrix:Reloaded
Alien vs. Predator
Spiderman 3 (big dropoff from the first two)
Roadhouse 2 (well i wasnt disappointed, i knew it would suck)
Teenage Mutant Ninja Turtles 3
Stayin' Alive (sequel to Saturday Night Fever)

every sequel to Planet of the Apes

all of the straight to video Disney animated sequels

every single Land Before Time sequel. dinosaurs should not sing and dance. i saw the first movie in theaters, and everything after it sucked.