I think the image above says it all. Sackboy will be dressed to kill (literally) in the new costume pack coming out this week. He's slick, he's in shades, and now considered a Man in Black.
Agent S and Agent J are joined by some aliens from the Men in Black movie to be added to Sackboys wardrobe choices.
Don't forget to download the MIB costume pack for LittleBigPlanet this week to celebrate Men in Black III hitting cinemas soon.