Is it weird that I have a Ben 10 couple idea that isn't related to the main cast?
I can see a Vuplimancer and a Loboan couple that is living on Earth using identity masks so they don't have to live in Undertown. The Loboan goes missing (maybe people found out he's not human and mistook him for a real werewolf?). Anyway, Rook and Ben have to interview the Vuplimancer who is pretending to be a mute blind human. For some reason, Ben runs off immediately to look for the missing Loboan, and Rook is stuck trying to interview the Vuplimancer that can not write or speak.
I think it would be an interesting little side story especially if they were living in an area that doesn't know aliens exist or Omniverse had the Plumbers and government officials covering up alien activities still on earth limiting alien sightings to *crackpot* theorists and a few hillbillies that witnessed things they shouldn't of. Like the one's that kidnapped a "werewolf" and were planning on exposing him to show they weren't crazy.
I imagine the reason the Vuplimancer didn't just track down their mate was due to them having to keep up the innocent *human* look and didn't also want to get captured as a werewolf. So they contacted the Plumbers instead to handle the situation.