A Battlefield 4 Beta listing appeared via a banner for Medal of Honor Warfighter as a preorder incentive. Medal of Honor 2010 offered the same deal. If people pre-ordered the game or bought the Tier 1 edition, players were granted an early access to the Battlefield 3 beta. It seems like EA wants to do the same thing with Battlefield 4 by offering players access to the beta if you pre-order Medal of Honor Warfighter on Origin. No other details have yet surface nor a complete confirmation regarding Battlefield 4's existence.
Original Source - MP1st