A few new arenas are on their way into Rocket League, including a new 8-sided arena called Octagon!
As stated in the post in the Steam community announcement:
Available for both Online and Offline Exhibition play, “Octagon” is VR-themed like other Rocket Labs Arenas, but the large, eight-sided walls are what set it apart.
The “Octagon” arena isn’t the only addition headed to Rocket League, as two more variants of classic traditional fields,”Urban Central (Dawn)” and “DFH Stadium (Stormy),” are coming as well. As always, both variants will be included for Online and offline play in Exhibition and Private matches, and the Ranked Playlists as they should be. Check ’em out below!
The new arenas are coming in the September update.