Initially, Psyonix said that the F1 and Nascar vehicles Rocket League Credits and corrective packs would come to Rocket League in May, and the date has at long last been affirmed. 

You'll have the option to purchase the themed packs in Rocket League from May 6 until May 12, and there will be nine vehicles to get altogether. When they're live, we'll affirm the costs of everything. 

As the studio said, "Prepare for the most high-octane www.lolga.com season yet, highlighting another Rocket Pass, Challenges, and substance from NASCAR and Formula 1 coming in May!"