With Mario promised 5 reps does this mean we could possibly get a 5th rep for each of other two of the big three franchises?
Assuming Shiek doesn't count, Zelda series does have Toon Zelda/Tetra, Ganon (The Original Ganon, not Ganondorf if we're still going with alternate versions of the Triforce 3), Tingle (Not likely since Western Audiences hate him), Skyward Sword Impa, and (just for you NSM and Dragonfreak) Ghirahim as possibilities should there be another Zelda rep.
This might be good news on the Pokemon front however. As assuming Jigglypuff, and Pokemon Trainer are set in stone. There's room for both Mewtwo AND Lucario.