As a big fan of both Stranger Things (the TV series) and Rocket League, I approve of the little crossover they're currently doing for the new Halloween event the Haunted Hallows.
Running from now until November 11 at 6PM UTC, the Farmstead Arena has been given a bit of a makeover to be a bit more spooky. Complete with a freaky creature called the Mind Flayer watching over the arena. During the event you can once again earn Candy Corn to redeem for new themed in-game items. I'm quite a big fan of the animated spider decal, looks awesome.
This themed event also dropped along side a new update for Rocket League aimed at improving the user experience. It's not the update that removes loot boxes (that's coming in December) but does add a few useful changes.
A new Quick Play option was added, allowing you to jump right into the queue for the playlist and regions you used in your last session. They said new users will be stuck into a 3v3 standard match until they pick something else. Once a game is finished, there's a new post-game party up function. Quite handy, as there's a few times I've properly synced with a random player I've wanted to play with again.
You can see all the changes in this official news post.