Final Fantasy 13-2 is getting Snow and Valfodr DLC around May 15, 2012. Snow, who was one of the main characters in FF13, will get a whole episode to himself in Final Fantasy 13-2 called "Don't fight for me," which will delve deeper into his and Serah's relationship. The episode will also clear up some mysteries behind the Coliseum, according to FF13-2 Director, Motomu Toriyama.
Valfodr will appear in Snow's episode, in the Coliseum. He'll use weapons, magic, and summons against your party, and each time you defeat him he'll come back at a higher level and with additional abilities. Toriyama's said that Valfodr's supposed to be the strongest Coliseum boss, and when he's at max level he's the most powerful monster in the game.
Sounds like a good chunk of DLC to me. Not only do you get to clear up some story spots, but you'll also get to test your might against a tough boss. Are you going to pick up the Snow and Valfodr FF13-2 DLC?