I think it would be really freaking awesome if you could go Super Saiyan 2 for the saiyans. Goku could go SS3, Vegeta could go Majin Vegeta, Gohan could go Mystical Gohan, Buu could go into Kid Buu, Piccolo could go Super Namek, Cell > Perfect Cell, I noticed after you have changed forms, the cf bar keeps filling up, it would be really cool to where when it fills up again, you could ascend to a higher level. Also the fusion characters would be a nice addition.