More news via the Playstation Blog, two new(old) characters will make a debut in LittleBigPlanet sometime in the future. Media Molecule has announced that Old Snake and Sephiroth costumes will be available via DLC.
"LittleBigPlanet and Sackboy have a strong identity and flavor. So then you try to find the translation to Metal Gear and Sephiroth, and the guys that made the characters really brought the flavors of LittleBigPlanet and Metal Gear together and kept the flavor of both of them"
No word on whether the costumes will be free or not, so stay tuned!