The Wii U Special Edition of the game includes lots of DLC for those of you who want to finish the trilogy on a different format to the one where you've created a save already. To make up for this, there's an 'interactive back story experience' which catches you up and allows you to make some important choices to set up the third game. Other extras include the From Ashes and Extended Cuts and a new heavy weapon. Extra multiplayer content includes the Resurgence, Rebellion and Earth packs.
Thanks to whusayn at HotUkDeals.