As it currently stands, Rocket League is only available on PlayStation 4 and PC. It would be easy to assume that Rocket League is a PS4 and PC exclusive kind of deal because of this, but surprisingly the game does not have any exclusivity deals whatsoever. Because the development team of Rocket League is quite small, they just haven't had the time or resources to push out the game to any other platforms just yet.
Thankfully, the Rocket League developers do have plans to move the game to new consoles, and yes, that does mean that the game could come to Xbox One.
Nothing has been confirmed just yet, but one of the Rocket League developers did recently mention that they do have plans to release their game to other platforms, in addition to the PlayStation 4 and the PC.
When asked whether Rocket League would come to Xbox One, a developer of the game chuckled a little and then made the following statement.
"I can't say. We're looking at all kinds of platforms and there may be some announcements coming up at some point-hopefully before the end of the year-but I can't confirm that."
What that says is the Rocket League team definitely have plans to get the Xbox One port out there, and they are probably already working on it, but they can't quite say anything about it just yet.
So there we have it, hopefully by the end of this year we will hear something about an Xbox One release for Rocket League.