Board Thread:General Discussion/@comment-25355646-20140901164014/@comment-25926288-20160728224810

CoolDudeAl wrote: A crossover is a fun idea, but considering Supernatural and Once Upon A Time air on two different networks that are not associated with each other, that has a 0% chance of happening. Make that negative 50%! XD

Different networks, different continuity, different in every way possible. Disney/ABC would never let anything come close to that.