How long do you think it takes to create the area, detail, add enemies and scripted encounters. NOT 2 MONTHS, this shit takes time, adding just the environment in anticipation is not unheard of or in bad practice. Without already creating the areas first im sure we would be waiting 6 - 8 months like a lot of other games make you wait for dlc.
as a former programmer - i can assure you - the amount of work which can be copied, pasted, modified, and slapped together in 2 months.. for 1 person.. is astounding.. when you have a group of say 6... it's truly quite remarkable. the biggest hangup in design is the texturing and basic map layout. the scripted encounters, adding enemies, and etc.. is basic drag and drop with slight modification. so while i had to be the buzzkill here - yes.. full dlc packs can be produced and pushed out in 2 months. it's not unheard of nor is it impossible. it's a question of how much manpower you put to it.
Ya but the dlc's was part of the game that they took from it so it shouldn't take even 2 month's there just a bunch of money grabbing people that's all there is to it