They need to focus on the nintendo franchises if they're going to bring in more characters. I mean, it's gotten to the point where we have almost as many third party characters as we do Nintendo characters. On that respect, I personally want to see Smithy from Mario RPG get in. I think he's a really underrated villain that didn't get a lot of development that they could have a lot of fun with him if they tried. I mean, Smithy has a hammer he can use, and weapons he can probably summon. I can easily imagine a good move set for him, and his final smash can be his final form in Mario RPG.