The official website for Rocket League now features patch notes for a new version 1.04 update that's now available for the hard-driving association football/soccer game (thanks VG247). The update adds new cars and other content, new trophies and achievements, a spectator mode, a new arena, a ranked queue, a match forfeit option, and more. Here's a summary:

THE HEADLINES

• Added “Supersonic Fury” DLC Pack Support, including…
  • (DLC) Exclusive “Dominus” and “Takumi” Battle-Cars
  • (DLC) Six Decals for each new vehicle
  • (DLC) Five new paint types: “Brushed Metal, Carbon Fiber, Metallic Pearl, Pearlescent,” and “Wood”
  • (DLC) Two new Wheels: “Cristiano” and “Spinner”
  • (DLC) Two new Rocket Boosts: “Burnout” and “Nitrous”
• Added “Utopia Coliseum” Arena
• Added “Spectate” to “Choose Team” menu in “Private Matches,” allowing players the option to watch games rather than participate (3v3 match-type maximum)
• Added 70+ new Country Flags and three “Sorry” items for our overloaded launch servers (“Servergate” Wheels, “Disconnected” Antenna, and “White Flag”)
• Added 3v3 Team Ranked as a replacement for 3v3 Solo the Online match queue
• Ranked matches will no longer start if the game is not full
• Added the ability to create or join Private Matches that can be named and/or password-protected
• Added “Vote to Forfeit” button to “Ranked” online matches
• Up to four Party member’s Battle-Cars can now be displayed on the Menu screens