Psyonix announced today that Patch 1.05 will be available in 2 weeks or less, and here's the list what it brings to the game:

You can finally search for a new ranked match at the end-game screen:
@RocketLeague via twitter
BTW, the 1.05 Update (available in 2 weeks or less) will add the "Find New Match" option to Ranked endgame screen (sorry it took so long)

PC players can filter PS4 players:
@RocketLeague via twitter
Fun Fact: When our next update hits (in two weeks or less), PC players will be able to filter PS4 players out of their matchmaking search

Usernames displayed as ********* will be fixed
@RocketLeague via twitter
@KrisVinesGames Yep. v1.05 will correct the issue that caused PC players to appear nameless to PS4 players following suspend/ resume

Broken textchat will still work after coming from suspend mode on PS4
@RocketLeague via twitter
@KrisVinesGames PS4 Text chat will properly work after suspend/ resume in v1.05 too

Season 1 finally starts with 1.05
@RocketLeague via twitter
@andreas0013 Season 1 will start with our next update

There will be a music player in the game to switch between the game's music tracks
@RocketLeague via twitter
FUN FACT: Our next update (in two weeks or less) will add a music player interface to menu screens so you can cycle through the game's tunes

Improved savegame corruption protection
@RocketLeague via twitter
@nategraphics Unfortunately, there's not much we can do after the fact, but v1.05 will have improved corruption protection to help

Changes/improvements to Utopia will happen in 1.05 as well
@RocketLeague via twitter
@Ultimatetj Not in the very next one, no. But we will be making some updates/ fixes/ refinements/ changes to Utopia in there

And finally some non-patch related info:

Middle east servers will still come at some point (questioned on twitter):
@RocketLeague via twitter
@metchi_metchi Still TBD. Ran into some logistical snags with those. Still in the plans, though

Update:

A new flag will be included as well
@RocketLeague via twitter
By pop. demand (and as @DunhamSmash promised Kevin on his show) the @Attack flag is coming to Rocket League in 1.05! http://supercreative.tv/rocketleague/

Update 2:

Chivalry: Medieval Warfare Flags will be in too! Thanks to crackerbears for the heads up.
Source: Steam: Rocket League