Sure, it's been awhile since you've explored Rapture. But the call of ADAM will always bring you back--assuming that 2K Games has you pegged correctly as the type of person who likes defending Little Sisters as they suck the sweet, sweet BioShock 2 nectar out of Splicer corpses.
2K Games and 2K Marin announced Protector Trials this morning, a freshly announced chunk of BioShock 2 DLC that will have you protecting Little Sisters against Rapture's best as they bum rush her for a taste of ADAM. From what I can tell, it looks like 2K Marin removed the reason as to why someone bothered with these sections of the campaign in the first place, and jammed them into a six-level challenge-room romp, each level of which is stripped from "favorite locales" within BioShock 2.
Protector's Trials will hit on August 3 across all of BioShock 2's platforms for $4.99 (or 400 Microsoft Moon Bucks).