https://wccftech.com/rage-2-pre-order-bonus-avalanche-engine/

We learned a great deal of new information on RAGE 2, and even saw the game in action for the first time, though published Bethesda Softworks promised a lot more to come during their own E3 2018 Showcase event (set on Sunday, June 10th at 6:30 pm Pacific Time).

However, retailer Amazon also separately confirmed that there will be a pre-order bonus: an exclusive mission, a vehicle, a pistol and an armor piece.