It's still not completely clear whether the downloadable content for the Xbox 360 verson of Grand Theft Auto IV will arrive this Fall - the answer seems to change based on which anonymous source you talk to. However, Rockstar may have just revealed some information on what form the DLC will take.

A fake ad has appeared on Rock Star Social Club from Eugenics Inc., the fictional scientific company with an office in Liberty City. The ad is an orange flyer announcing a quarantine in response to the outbreak of a "contagious disease." According to the flyer, the quarantine was ordered by Eugenics Inc. and the Liberty City Police Department.

Everyone's in a Halloween mindset right now and it's led Joystiq and others to speculate the DLC will feature a zombie outbreak. Wasn't Rockstar shooting for gritty realism in Grand Theft Auto IV, though? Well, a group of rabid infected people is more technically more realistic than, say, having the undead rise from their graves. Ultimately, who cares as long as it's fun to play?