BioShock 2 will have DLC -- we'd have been (bio)shocked otherwise. Speaking to AustralianGamer, Senior Systems Designer Kent Hudson revealed that the studio has "pretty aggressive plans for DLC" and that it's "something that is already under-way." No further details were provided.
The original BioShock was lacking in the DLC department, only providing some extra plasmids and adding challenge rooms for the PS3 port. Hopefully, the numerous studios working on the sequel will have all their Splicers in a row for the game's February 9 release date.