Stating the obvious Platinum games has confirmed that if the game is a hit they'll look at making another one.

A portion of a TVGB interview with Astushi Inaba, the game’s producer, and Shigenori Nishikawa, the game’s designer…

TVGB: So if this is a big success will you move on to a different title on the Wii or are you thinking about sequels?

AI: Platinum Games has several rights so we’ll be developing something new after this, but if there is a lot of interest in MadWorld then maybe we will make another one.

via http://gonintendo.com/?p=72980

I wonder how many sales constitutes being a "hit"....

Anyways I hope this game does well. I pre-ordered it along with Sonic through Amazon two days ago.

buy 2 copies everyone

Let's hope Mad World is a million seller, I would like to see this game become a success.