[UPDATE] Exciting news today as Activision has announced all the incoming content coming in the next few months as part of the two final Content Collections to Modern Warfare 3. Collection 3: Chaos Pack will be hitting the Xbox 360 first on August 9 and Collection 4: Final Assault will be dropping on September 6.

Activision issued a press release detailing each of the upcoming collection packs. Descriptions of the DLC collections are below.

Call of Duty: MW3 Collection #3: Chaos Pack offers extensive solo and co-op gameplay for the Special Ops enthusiast, featuring four brand new Special Ops Missions — Vertigo, Arctic Recon, Light ‘Em Up and Special Delivery — and FACE OFF maps — Vortex, U-Turn and Intersection.

Introducing a new way to play Call of Duty®, Special Ops Chaos Mode delivers a frenetic form of combat that demands players to outlast waves of enemies, while chaining kills on maps littered in power-ups to achieve the highest possible score on fan-favorite multiplayer maps Resistance, Village, Underground and Dome.

The final act of the Call of Duty: MW3 Content Season, Collection #4: Final Assault, is tailored toward hardcore multiplayer fans, and features five all-new multiplayer maps.

“Gulch” sends combatants into a forgotten mining town with mine shafts and equipment sheds for cover.  In “Boardwalk,” fun in the sun on the Jersey Shore means facing enemies on the beach.  “Offshore” and “Decommission” will test players’ sea legs on deadly oceanic oilrigs and among a maze of rotting ocean liners respectively. Rounding out the collection is a trip to the French Quarter in a war-torn New Orleans, where “Parish” pits players against one another amidst the city’s rubble.

Last week, we tweeted about a rumoured Special Ops Chaos mode as part of the ‘classified’ DLC and it now seems to be confirmed. Activision has provided a description of the mode, seen below.

A whole new way to play Call of Duty®, Special Ops Chaos mode delivers the ultimate in arcade mayhem. Chain kills together against a never-ending onslaught of enemies to increase your combo multiplier and earn performance-enhancing perks. Choose your route through each map to optimize weapon pickups, attack, and escape options. Play solo, split screen or online with a friend to take out as many enemies as possible before they take you down or the clock hits zero.

More details can be found on the official Call of Duty: Modern Warfare 3 community blog post.

[Update] In other news, Activision has confirmed that drops 19-21, including Spec Ops Chaos Mode and missions Special Delivery and Light ‘Em Up, will arrive on Xbox LIVE Elite premium on August 7th. Plus, drops 22-24, consisting of multiplayer maps Gulch, Boardwalk, and Parish, have been set to release on September 5th for the Elite members.

Dates are TBA for other platforms and PC. Stay tuned as more details are released.