I'm starting to get Smash 4 cravings. With that comes the inevitable pondering of which new characters will be included, and who (if any) will be removed.
First of all, I want Mewtwo back. He should have never been taken out in the first place, and replacing him with Lucario was a joke. I know there's rumours that Zoroark would be the new Pokemon in that slot, but it seems unlikely to me, as Zoroark's ability in the Pokemon games is to create illusions. He appears as another Pokemon in your party until he gets hit, and how would that translate to Smash, considering everyone can see your character selection? If they really have to have a representative from the latest generation of Pokemon, why not just update the Pokemon Trainer? Instead of the Kanto starters, he can use the Unova ones. Done.
Some more female characters would be nice. The Fire Emblem series really needs a female representative, and there's really only one choice there - it has to be Lyn. It doesn't seem like much of a stretch either, since she was an Assist Trophy in Brawl. I guess Rosalina/Daisy could join, although I don't think they are really needed. Dixie Kong?Krystal can join the Star Fox lineup, and with her staff from Adventures, she could have a fairly unique moveset.
I'm a big Golden Sun fan, so I'd love to see Isaac (or Matthew) included in the roster. Dark Dawn wasn't too long ago (and it seems destined for a sequel, assuming it didn't bomb), so the series is relevant enough. Isaac is also another character who was an Assist Trophy in Brawl, which can only help his cause. I mean I'd love to see more GS characters, but that would be pushing my luck.
This might be wishful thinking, but I'd like to see an Advance Wars character in the game, and Andy seems like the most logical choice. He could be a Pokemon Trainer style character, commanding his Units from a distance. I'm sure they could find a way to make it work.
As for third party characters, I'd love to see Mega Man.