Psyonix has shared the first details on Rocket League’s upcoming Rocket Pass reward system.
Similar to Fortnite’s Battle Pass, Rocket League’s Rocket Pass will allow players to earn new content through a time-limited progression system. As you earn more Rocket Pass XP, you’ll unlock more content. However, this does not replace the current XP-based progression system.
Source: IGN.com Rocket League: First Details of Rocket Pass Revealed