Kid Icarus would great for the better controls alone, but thinking about the graphical update that could be done and the online multiplayer, I don't know why Nintendo seems content to let such a great repackaging of a sort of bland franchise languish for just Smash bros appearances when it can do more good with a modest port or even side story game focusing on its battle mode.
I mean it sold over a million globally which is respectable for franchise reboot of a franchise only the hardcore old heads even knew existed and for all the complaints people had in relations to the controls.