Seriously...this is an insane deal. Check out the confirmation of this deal straight from a FutureShop board admin...

Bring a copy of ANY used Xbox 360, PlayStation 3 or the Wii U game (one that works and has the original jewel case) and you can trade it in for a current generation (Xbox360, PS3 or WiiU) version of: Assassin’s Creed IV, Call of Duty: Ghosts or Battlefield 4.

Full details here
Link