UPDATE: The patch has also been released on PS4 and PS3 (excluding the Devastation support). The four new character customization options are now available on the PlayStation Store.
A new 2.1gb patch for Call of Duty: Ghosts was just released on Xbox One, 256 MB for Xbox 360, 1.75 GB on PS4, and a 357 MB on PS3 patch added new menu music, which you can listen to here. It also, finally, added the Onslaught DLC maps into the rotation in all playlists.
In addition to all of this, a new random loadout option was added called “Generate New Loadout”. And there has been some upgrades to the Extinction with a new Teeth system.
On Reddit, user FlammenwerferIV explained what the new teeth system is about:
Basically, you earn “teeth” by Prestiging, completing Extinction maps, and other things. Then, you can use them to buy permanent upgrades for Extinction, like increased Sentry Gun health and the ability to Hypno-Knife a Rhino.
Once patch notes are released, we’ll update.
SOURCE: @Exq_Fallout and @FlammenwerferIV