The Halo 4 Champions Bundle launches on 8/20 for 800 Microsoft Points. You can read more about what it includes here. For now, check out the details of the 8.19 Title Update, which supports the upcoming DLC as well as enables the use of two Support Upgrades which are available to all players free of charge.
New Support Upgrade available to all players: Recharge
-Recharge decreases the time it takes for your shields to recharge.
New Support Upgrade available to all players: Survivor
-Survivor ejects you out of a vehicle if it’s about to explode.
Enabled the ability to download, play and equip all of the premium content included in the Halo 4 Champions Bundle, including: