I have compailed leaked pics / information into imgur galleries and written out sub-classes.

Have salt like always with leaks

Leak source: http://m.jeuxvideo.com/forums/42-33957-52865577-18-0-1-0-topic-des-leak-spoil.htm & http://www.gamingsincegaming.com/wiki/destiny-2/

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>>>Gamingsincegaming.com info from here down:

Campaign - 17 missions

Amount of areas / sectors per destination
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EDZ - 19
Titan - 8
Nessus - 21
Io - 10
Earth: The Last Bastion of Humanity - 1

Strikes - 5

Exotics
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Kinetic - 5 with MIDA returning
Energy - 7 with Hard Light returning
Power - 6
Titan - 2 helmet, 3 gauntlets, 3 chest, 3 leg with Skullfort, ACD/0 Feedback Fence, Alpha Lupi and Dunemarchers returning
Hunter - 3 helmet, 2 gauntlets, 3 chest, 3 leg with Celestial Nighthawk, Knucklehead, Young Ahamkara’s Spine and Raspberry returning
Warlock - 4 helmet, 3 gauntlets, 2 chest, 2 leg with Skull of Dire Ahamkara, Starfire Protocol and Transversive Steps returning

Visuals of some of the exotic gear: http://i.imgur.com/ql0Ut8d.jpg

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>>>ZJeuxvideo info from here down:

Weapon gallery: http://imgur.com/a/mGi8c
Armor gallery: http://imgur.com/a/6HygH
Xur: http://i.imgur.com/r6JHOU4.jpg
Vendor / NPC list (BIG SPOILER!): http://i.imgur.com/F9Kjri0.jpg
Social space that isn't Farm (BIG SPOILER!): http://imgur.com/a/yGN3x
Ghaul art (BIG SPOILER!): http://i.imgur.com/n6CBHqN.jpg

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General info:
>I have unfortunately confirmed that the blink is now unique to the warlock
>The new RAT KING looks genial you know you become invisible when you reload for each ally equipped with the weapon the damage is increased until X6
>There is a grenade launcher which has a mention that indicates that it can only be equipped in the category energy and non power
>Power level maximum is 300 at the confirmed launch and you can climb 260 max via the activities and engram ensuit for past the cap of 260 until 300 you have to do the heroic activities of the week like nightfall, raid, flashpoint etc.
>Exotic gloves that each shield bash Kill completely reloads the shield throw and the kill to the special melee accelerates the reload of the super (for Titan?)
>100+ legendary weapons
>Haven't counted armors
>Won't post all exotics, but can / will post few here and there based on requests

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Returning sub-classes and their paths:

These sub-classes are obtained by collecting class specific artifacts and completing quest triggered by them.

Nightstalker

Upper Path - Way of the Trapper
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Snare Bomb - Throw a smoke bomb trap from a distance with Melee Ability. The smoke bomb sticks to surfaces and detonates when enemies are near, slowing and disorienting them.
Keen Scout - Sprint and sneak faster, and gain an enhanced tracker. Tethered enemies are marked for easy tracking.
Deadfall - The Void Anchors fired from Shadowshot become traps and wait for prey. Void Anchors have increased range and last longer.
Vanishing Step - Dodging makes you vanish from sight for a short time.

Lower Path - Way of the Pathfinder
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Vanish in Smoke - Throw smoke bomb explosive from a distance with Melee Ability. The smoke bomb creates a cloud that makes you and nearby allies invisible.
Lockdown - Grenade and smoke effects last twice as long, allowing for strong territorial control and increased damage potential.
Heart of the Pack - Killing tethered enemies creates Orbs of Light and increases Mobility, Recovery, and Resilience for you and nearby allies.
Moebius Quiver - Fire Shadowshot multiple times in rapid succession. Shadowshot deals massive damage against tethered enemies.


Stormcaller

Upper Path - Attunement of Ions
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Chain Lightning - Deliver an electrocuting Arc melee strike at extended range that chains from the struck target to another enemy nearby.
Transcendence - When cast with full grenade and melee energy Stormcaller lasts longer and fully restores health.
Arc Web - Enemies damaged by your grenades chain deadly lightning to nearby enemies.
Ionic Blink - Press the Sprint button to teleport during Stormcaller.

Lower Path - Attunemen of the Elements
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Gale Force - This electrocuting Melee Ability hits at extended range and recharges your Super, grenade and melee energy.
Landfall - On casting Stormcaller fire a bolt of lightning into the ground, creating a devastating shockwave under you.
Rising Storm - Your Rift charges faster when allies are near.
Arc Soul - Your Rift now grants you and any ally who uses it an Arc Soul to aid in battle.


Sunbreaker

Upper Path - Code of the Fire-Forged
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Hammer Strike - While sprinting use this Melee Ability to unleash a blazing Hammer strike that weakens enemies.
Tempered Metal - Solar Ability kills grant you and nearby allies bonus movement and reload speed.
Battle-Forge - Enemies killed by Hammer of Sol explode.
Vulcan's Rage - Hammers shatter into explosive molten embers on impact.

Lower Path - Code of the Siegebreaker
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Mortar Blast - Strike an enemy with this Melee Ability to release a Solar explosion, setting nearby enemies on fire.
Sun Warrior - Solar Ability kills restore your health. Grenade and Melee Ability kills leave a deadly Sunspot in their wake.
Rings of Fire - While standing in Sunspot your Solar Abilities recharge faster and your Super lasts longer.
Solar Siege - Hammers create a Sunspot on impact. While standing in Sunspot you throw hammers faster.