Fortnite and Rocket League have kicked off a small new crossover event, called Rivals & Rockets, and it's got unusually good rewards. With a fairly minimal amount of grinding, you can earn a free Fortnite skin and a free car body that works in both games. But you'll have to play Rocket League to get the skin. The Rockets & Rivals event runs until April 30.To unlock the free skin--Dueling Dragons J