From Press Release:
Psyonix, the San Diego video game developer, announced that Rocket League’s Season 3 will go live on April 7!
Rocket League Season 3 will celebrate the art of auto racing and will feature NASCAR content in early May and Formula 1® content in mid-May. In addition, there will be a new Rocket Pass headlined by the Tyranno car, new DFH Stadium (Circuit) Arena, and more.
Rocket League Season 3 begins on April 7 following a game update on April 6 at 4 p.m. PDT (11 a.m. UTC). More information about the Season and Rocket Pass will be shared next week.