Agreed. And with all Terminator films after Terminator 2.
Also, Neverending Story 2 and 3 can be ignored. I mercifully didn't even know the third even existed until hearing about it on TV Tropes. It's like one of those horrible fanfictions where everyone's written ridiculously out of character and singing rock songs for no reason, only done as an actual movie. Best to be ignored.
Highlander 2, of course, but we've been saying THAT since the early 90's at least. It's kind of like beating a dead horse by now.
Galactica 1980 has been ignored by fans of Battlestar Galactica Classic since even before the early 90's. Comic book continuations of Battlestar Galactica Classic have also ignored it.
Going back further, Trail of the Pink Panther and Curse of the Pink Panther - Blake Edwards' poor attempts to continue the franchise after Peter Sellers' death.