Mario & Luigi: Bowser's Inside Story

Mario & Luigi RPG 3 (tentative title) is the upcoming third title in the Mario & Luigi series. It was confirmed on October 2 at the Fall 2008 Nintendo Conference and will be released in 2009 for the Nintendo DS. The shown footage was very short, but one could see a giant spherical Toad rolling on the screen, Mario and Luigi using a Green Shell on a green bug-like enemy and Bowser using Fire Breath on two tree-like enemies.

Characters
So far, these are the confirmed playable characters:
 * Mario
 * Luigi
 * Bowser