>>9474653>Grundel could make for a good movie with Spengler's grandchildren.A vampire that convinces children to misbehave until it can possess their body would make for a good family-franchise movie villain to be sure, and the movie moral is built into the creature already.
The Boogaloo would make for a good movie bad guy too, especially if they keep releasing movies in october. Like, this dude's deal is literally "unless you dress up, decorate with spoopy stuff, and fuck around on halloween, I'm going to come back to earth and wreck your shit". You can even do the hobbit level thing of getting the different heads to argue with each other during the epic final battle.