Found this on reddit. Seems to be legit, just not yet announced. Figured I'd post it here knowing that many of you guys have $250 trade in credit and were debating whether to get in on the BB offer this weekend.
EDIT: eliter1 has confirmed:
It's on their facebook page.
Going to pick up my Elite console tomorrow, hopefully I can get the controller and they will honor this on Friday for a free game.
Get a free controller + free game when you purchase a new Xbox One 11/6-11/8! Can’t wait until then? Starting today, get a free controller when you purchase a new Xbox One. http://www.gamestop.com/xbox-one