I'm all for pre-order bonus, but I honestly cannot stand DLC. If there's going to be any skins or whatever, they should already be on the disc, ready to be unlocked in game at any time. Especially if the game itself is bought at a full $60+.
EDIT: And as others have stated, it's far too early to be talking about DLC. We don't even know if this game will be worth spending extra money on.