X-Men: The Last Stand
This movie gave us two decent things: Kelsey Grammer as Beast, and that unintentionally hilarious bit where Logan gets flung into a tree a la Evil Dead 2. Almost everything else is either bland or executed poorly. And if you know where to look, the mid production reshuffle of the plot is a bit obvious. It really should have just picked one of the two stories it was going for, instead of introducing Phoenix just to have her hang out at Mutant Burning Man in the woods and then stand around doing f**k all for most of the climax. Honestly, they should have dealt with the scheduling issues by just doing the Cure here to cull some characters, and saved Phoenix for X4.