But there are sooooooo many characters to unlock. It's going to be a while before you get all of them.

Not a fan of the workaround you need to go through in the event you lose the initial New Challenger Approaches fight, which can happen so easily. And I feel bad for the people who aren't good at this game but want to unlock new characters. Or unlock a character they're better with but have to do it with one they're not so hot with.