I have wondered this as well. I bought it for my son a month ago, and he said there are a lot of episodes out on the other systems. If I would have known this I would not have bought it on the Wii U and grabbed it on the One. I am not going to rebuy the base game though just to get the dlc. Hopefully soon, and if not oh well they lost my money. I am sort of thinking the other episodes may not come honestly, since we have heard nothing and you cannot even buy the season pass or anything.