This is a sequel to a PS3 game I'd never heard of (Supersonic Rocket Powered Battle Cars) coming to PS4 and PC this summer.
It's presently in a public closed beta on the PS4, which will be running until May 3rd and you can still sign up for http://psyonix.com/BC2/Invite/RocketLeagueSignupPS4.php?Keyword=PSBlog
Basically it's 3v3 soccer played with RC cars with jumpjet boosters. From my limited time with the beta it's pretty fun, but some games resemble soccer as played by 3 year olds, with everyone just chasing madly after the ball. Your teammates also can cause you more problems than your opponent, whether by bumping you or the ball as you are lining up a perfect shot in their zest to just hit it.
Some highlights from someone far more skilled than I am at the game, though I have pulled off an epic save and scored some cool goals.https://www.youtube.com/watch?v=zdVmqssa5v4&hd=1
I'm not sold on the name, as I was expecting something quite different from that alone.