quote Gamespot

Media Molecule's Little Big Planet has been one of Sony's most successful PlayStation 3 exclusives, both as a stand-alone retail release and as a platform for downloadable content. So, when a June job listing revealed the Guildford, England-based developer was staffing up for a "ground-breaking, AAA, PS3 title for Sony Computer Entertainment," many believed that a sequel was on the way.

Sackboy apparently has plenty more costumes in the works.
However, that now appears not to be the case. In a recent interview with UK gaming site Critical Gamer, Media Molecule level designer Danny Leaver discounted the idea of a Little Big Planet sequel for the PlayStation 3, due to the harmful impact it would have on the player community.

"We'd never want to do that," he said. "That'd be the most counterproductive thing you could do, I think." Producer Martin Lynagh went on to note that Media Molecule plans to continue supporting the original Little Big Planet with downloadable content and other updates, saying "I think what you've seen so far from Little Big Planet...that's the way it's going to continue."

Launched to critical acclaim in October 2008, Little Big Planet combines multiplayer-centric platforming with a lighthearted aesthetic that's fronted by Sony's pseudo-mascot, Sackboy. In April, Sony announced that Little Big Planet's player community, which uses the game's versatile level-creation tools to generate new material for the game, neared the 2 million mark. A PSP version of the game is due November 17.