The "NEW!" Official Call Of Duty Thread:BO2 "Apocalypse" DLC Drops Aug 27th

Point Streaks build upon each other. (Player in the MP trailer earns a help pilot point streak while using the dragonfire). - yeldarBL
Kill feed has been moved to top right. - yeldarBL
KDR and other in game stats are displayed in top right with no need to pull up a menu. - yeldarBL
Knife seems to have been changed to have about 1 second of vulnerability. They did not mention this, but it can be seen in the trailer that is linked below.
Every map has objects that can be destroyed to get an advantage over the enemy.
More perks split into different sections
30 New weapons
Character customization - Female characters
10-Point Class system. IW's version of it, not exactly the same. "I don't think it's 10 points, since perks can have as many as 5 points IRC." - MeGustaTortugas
20 New killstreaks(less air based/UAV ground-based)
Strike packages are back
"Scorestreaks are out, pointstreaks are back. Unfortunately." - Mojammer
No more death streaks
Squad points to unlock equip. Buy any weapon at any level.
You have 10 soldiers with 1 prestige each instead of classes
About 10 new gamemodes - Cranked: new gamemode like TDM, 30 seconds to get another kill after death before exploding. Timer resets after another kill.
AI improved (drop shot, corner camp, side strafe)
Squads (like League Play. Against AI or people) different gamemodes, gain XP towards Multiplayer, AI affected by your equip choice.
New engine makes movement much smoother
New audio engine. Reverb engine changes sound inside/outside. Locational battle chatter improved, player will say when they see an enemy. Reactive emitters, objects react to things like explosions (ex. fences will shake).
Competitive scene supported. Seems like their own take on Codcaster has been added. Watch gameplay footage (Pro players VS Marines. Skip to 33:00)
New CoD accounts (FREE) Take profile(xp and such) from xbox 360 to xbox one.
CoD app. Features from Elite, push your loadout straight into game. Second screen support. Share with facebook/twitter.
Robust clan support. Join/Create/Manage clan with account. Clan Vs Clan playlists. Clan Wars (Clan Vs All Other Clans) Special Clan-only skins.
Emblem editor. Available in app.
Season pass is back. When purchased, get ghost team leader pack. Upgrade to next gen, DLC comes with to new console.
Collector's edition. Hardened Edition confirmed. Prestige edition comes with new 1080p HD camera, modeled after helmet cam ingame. Shock and Water resistant.
First 500 people to test-drive the game at any place during their "world wide tour" gets a free Prestige Edition game.
Limited edition dog tags are being sold at $4.99 each. 100% donated to help find veterans jobs.
Theater mode is gone

Spoiler:

? means uncertain if I read the letter right. Unspecified guns might be some of the other mentioned guns, but their descriptions and names weren't listed in the same place.

Assault Rifles:

Honeybadger: "Fully automatic. Integrated silencer allows for higher overall versatility, but lower range."
SA-805: "Fully automatic. Versatile and strong overall."
CZ-805 Bren
AK-12
MSBS
SC-2010: "Fully automatic. Reduced recoil provides higher accuracy."
Remington R5: "Fully automatic. Increased damage and range."
ARX-160
FAD: "Fully automatic. High rate of fire with moderate recoil."

Marksman Rifles:

Unspecified: "Single shot. Strong and versatile overall."
Unspecified: "Fully automatic. Increased damage and range.
Unspecified: "3 round burst. High damage output in each burst. Fast rate of fire in full auto with reduced damage."
Unspecified: "Fully automatic. Highest rate of fire in class with reduced recoil for the first 3 rounds of each burst."
Unspecified: "Single shot. Moderate recoil, highest damage per round in class."

Submachine Guns:

Vector CRB: "Fully automatic. Highest penetration and damage in its class."
CBJ-MS
MTAR-X
Bizon
Vepr
K7

Shotguns:

MTS-255: "Double action. 5-round revolving cylinder shotgun that lets you run and gun in style."

Handguns:

P226: "Semi-automatic. Largest ammo capacity in its class."
M9A1: "Semi-automatic. Versatile and strong overall."
.44 Magnum
MP-443 Grach: "Semi-automatic. Low recoil and highest fire rate in its class."

Launchers:

MK-32: "Grenade launcher with revolving 6-round cylinder fires (?) semtex explosive rounds."
Kastet: "Grenade launcher. Fires rounds that explode on impact."
Panzerfaust: "Free-fire shoulder mounted rocket launcher."

Unspecified:

MICROTAR
KRISS
SVU
MR-28
MAUL (?)
Minigun
USR
IA-2
Bulldog
LSAT
M27-IAR
L115
MK14 EBR
MK14
Chain SAW (note: does not appear to be a chainsaw)
Riot Shield (source: Drift0r's twitter, not yet seen in footage)

Attachments:

ACOG Sight
Extended Mags
Grip: "Vertical foregrip for reduced recoil."
Red Dot Sight: "Precision reflex sight."
Muzzle Brake: "Increases damage at long range."
Slug Rounds: "Trade spread shot for a single deadly slug."
Silencer: "Invisible on radar when firing and reduces muzzle flash. Shortens effective damage range."
Hybrid Scope
Armor Piercing

Lethal:

Semtex: "Timed explosive device that starts its countdown on release. Sticks to any surface."
Frag: "Hold to control fuse time, remember to release. Produces lethal radius damage upon detonation."
I.E.D.: "Improvised proximity explosive device that sticks to any surface. Arms shortly after deployment."
Throwing Knife: "Retrievable knife that causes instant death on impact."
C4: "Plastic explosive device that sticks to any surface and is detonated remotely."
Canister Bomb: "Canister bomb that detonates shortly after release."

Tactical:

9-Bang Grenade
Concussion Grenade
Smoke Grenade
Trophy System: "Active defense turret that destroy two enemy projectiles."
Motion Sensor: "Paints the target with tracers that allow the enemy to be tracked through objects."
Thermobaric Grenade

Assault Killstreaks:

SAT COM (3 point streak)
Guard Dog (5 point streak)
Juggernaut Maniac (9 point streak)
Helo Scout (12 point streak)
Heli Sniper (13 point streak)
Juggernaut (14 point streak)
IMS
Sentry Gun
Vulture

Support Killstreaks:

SAT COM (4 point streak)
Ballistic Vests
Night Owl (9 point streak)
MAAWS (10 point streak)

Care Package Rewards:

Odin Strike

Modes:

Free For All
Team Deathmatch
Search and Destroy
Domination
Kill Confirmed
Search and Rescue
Grind
Blitz (portals mode according to BigTymer)
Cranked
Infected
Hunted
Safe Guard

Maps:

Octane (gas station)
Strike Zone (baseball stadium)
Whiteout (snowy lodge) (not named in any footage to my knowledge, but named on OneOfSwords' blog)
Freefall (lodged skyscraper chunk)
Chasm (subway) (not named in any footage to my knowledge, but named on Tmartn's Twitter)