Rocket League has been announced for Nintendo Switch at E3 with the additional bonus of being able to play cross-play with other platforms.
Apart from Sony. They've refused citing it is about commercial details. Sony have to be careful here as they may shoot an own goal after a top performance at E3. First Minecraft, then Rocket League. I'm not sure what their problem is as Psyonix have come out to clearly state they can switch it on for ps4 players within an hour as they run all their own servers.