However, Wisdom of Friends was the one that killed it. It's pointless trying to prove it never existed. There's just WAY too much evidence on the net to support it
I wouldn't just claim 13 never existed. I would claim 10, 11, 12 and the TV series never existed either. Everything past 9 stunk like heck.

They're gonna need 1 heck of a film (and 1 heck of a team) if they want to rebuild the series. I'm sorry, but with the existence of 10-13 and the tv series, and the abysmal post 6 animation, and the god-awful cheesiness of the later stuff, there's simply nothing that could be produced that would ressurect LBT.