Did not need any MORE sequels: Terminator and Robobcop. Both should have stopped at number 2, because Terminator 1 and 2 and Robocop 1 and 2 are all awesome movies. Number 3 though...shit for both of them. Way to ruin Terminator 2's message of hope and fighting fate.
Needed a sequel: The Super Mario Brothers movie. Yeah, that's right, the live action one with Bob Hoskins as Mario. It was a awesome movie (and I mean that, I love that thing) and totally set itself up perfectly. Big villain for the sequel? That Scapelli character who got turned into a monkey, only he manages to "evolve" into a larger monkey with more intelligence. Putting on his best tie he seeks revenge with his mafia ties and throwing barrels.
HOLLYWOOD I WILL WRIGHT THE SCRIPT FOR FREE! CALL ME!