Rocket League adds Hockey Mode
The latest update adds Hockey Mode, in which the ball is now a puck and the arenas look icy, as well as a host of new garage items. This puck doesn't have any traction and can slide up walls quite easily. This will let teams and players approach the game in a new way.
It could be a long-term addition, but the player base will need to support it. Psyonix hasn't set an end time on the mode, so that's reassuring at least.