@gamingonlinux This suck, but understandable the reason, even I don't agree with all concept of intellectual property.

The one example I remember that have a good turn around was the game "Fighting Herds" that originally was a MLP fighting game that receive a "Cease and Deceased" from Hasbro.

I can't remember now if was the creator of show, Lauren Faust, that offer help the creator to make new characters because the game was good and would be a wasted throw everything away.