Psyonix's Rocket League received update v1.29 today, which comes alongside the previously announced Hot Wheels DLC.

The DLC adds two new cars: the Bone Shaker and Twin Mill III. This update also added PS4 Pro support, which was also previously announced.  You can read the full list of patch notes below:

NEW CONTENT

(DLC) BATTLE-CARS

  • Added “Twin Mill III” DLC Battle-Car, including…
    • (DLC) Six new Decals:
      • Flames
      • Javelin
      • Overline
      • Speedster
      • Pyro
      • Primo
    • (DLC) One new Wheel:
      • OH5
  • Added “Bone Shaker” DLC Battle-Car, including…
    • (DLC) Six new Decals:
      • Bone Jack
      • Diablo
      • Inferno
      • Pro-Street
      • Starstruck
      • Stripes
    • (DLC) One new Wheel:
      • WW5SP

ANTENNAS

  • Hot Wheels Antenna
  • Treasure Hunt Flag

TOPPERS

  • Hot Wheels Topper
  • Shark Bite Topper

CHANGES AND UPDATES

GENERAL

  • "Player’s Choice Crate Series 1" can now be found rarely after online matches
    • This crate includes community favorite items voted on by the players
    • Painted Decals are now available through the Player’s Choice Crate
  • Rocket League now supports the PS4 Pro with 4K rendering

BUG FIXES

GENERAL

  • “Infinite Power!” and “Mad Scientist” Achievements have been fixed
  • “Lightning” Wheel is now properly named “Voltaic”
  • [PS4]: “Insufficient Space” now properly displayed when attempting to save a reply when the console’s hard drive is full
  • [PS4]: Saved replays will work properly when transferred from one PS4 to another
  • Vehicle driver- and passenger-side windows no longer have Blue or Orange tint when Black Market decals are equipped
  • Pressing shoulder buttons simultaneously no longer causes Item overlap on vehicle customization screen
  • Chain link pattern no longer visible when using certain Rocket Trails
  • Fixed performance issues with the Proton, Dark Matter, and Hypernova Rocket Trails.
  • Licensed Car items can no longer be forced onto other Battle-Cars

Rocket League is currently available on PC, PS4, and Xbox One.