What Could Have Been: The original script of The New Batch featured Randall Peltzer making a Cameo at the end of the movie with his latest invention — a wetsuit-type device to prevent Gizmo from ever getting wet again.
The first movie was going to be Darker and Edgier. Gizmo was going to become a gremlin in the second act, but this was deemed too confusing to audiences. Billy's mother was also going to be murdered by the gremlins, with her head rolling down the stairs. Additionally, Billy would have been your typical 80's Hollywood Nerd and not only traveled around the town with two companions during the madness (a love interest and a bully-turned-emergency-ally), but wielded a sword.
During production of the sequel, there were plans for an animated series. There was even a blurb for it in the He's 50, Folks magazine celebrating Bugs Bunny's 50th anniversary. Unfortunately, the poor box-office performance of the sequel resulted in the television series getting canceled.
There were going to be more Mogwai in the sequel,one of them a female that could have served as a possible Love Interest for Gizmo,but they were ultimately deleted.However,NECA released figures of the scrapped Mogwai reccently.Also,there were going to be more mutant gremlins as well,including an elephant/gremlin hybrid,but were left out in the end.