I found this interview earlier today. Answers a lot of questions. To long didn't watch: Brooklyn will not be in DLC. End Game as far as they were willing to tell us will consist of turning every story mission in the game into a Nightfall like activity. As well as Completing your Base of Operations since they designed it so you wouldn't be done with it once you beat the story, and of course the Dark Zone. They are currently considering the possibility of adding trading to the game, how ever they are unsure how to handle the player economy.