Aside from an iPhone game Sega hasn’t done much with the Super Monkey Ball franchise. AiAi seems to be paying his banana bills by making cameos in other Sega games like Sonic & Sega All Stars Racing.
Maybe, just maybe, Sega hasn’t given up on the Super Monkey Ball series. They registered a trademark in Europe for Super Monkey Ball: Step & Roll, which sounds like Super Monkey Ball with a balance board. This concept has potential. The Marble Madness-like mini-game in Wii Fit is fun to play. If Sega can borrow those controls and add solid Amusement Vision style level design I’ll give Super Monkey Ball: Step & Roll a whirl.