Get rid of Jigglypuff and Mr. Game&Watch first off. Nobody likes them or is good with them, period. Then, bring back Roy and Mewtwo. There is nothing wrong with having some duplications(even though Ike/Roy and Lucario/Mewtwo are very different(kinda)). Then add Megaman X, X is much cooler. Other than the addition of Megaman, I always thought for the 4th, they should include all past stages, music, items, modes, stickers, trophies, challenges etc. That coupled with some other new characters, stages, music, stickers, trophies, moaes, items, etc. would make the best Super Smash Bros. game ever. In my opinion.