What films do you want to see sequels made to?
I would have wanted to see the sequel to Roger Rabbit they were planning, but Spielberg said making a sequel in which Toons were fighting Nazis was in bad taste. He had just come off of making Shindler's List.
The sequel might have been fun-maybe in the sequel they would have had characters cameo that didn't appear in the first movie, the ones they couldn't get clearance to use in the original movie.