To go with the mere announcement of new Mass Effect DLC from earlier today, a leak has turned up what looks like details - and images - of the new weapons and classes available.
The "Earth" DLC seems to contain five new N7 classes, three new weapons and a new game mode, Platinum.
(Adept) N7 Fury: Throw, Annihilation Field, Dark Channel
(Soldier) N7 Destroyer: Multi-Frag Grenade, Missile Launcher, Devastator Mode, T5-V battlesuit?
(Engineer) N7 Demolisher: Homing Grenade, Arc Grenade, Supply Pylon
(Sentinel) N7 Paladin: Snap Freeze, Incinerate, Energy Drain
(Infiltrator) N7 Shadow: Tactical Cloak, Shadow Strike, Electric Slash
(Vanguard) N7 Slayer: Phase Disruptor, Biotic Charge, Biotic Slash, has a guddam sword *is Kai Leng I'm assuming*
Fury: "Fury operatives use implants to fuel biotics and their incredible
movement speed. These operatives wind an unpredictable path on the
battlefield, moving in and out of combat before returning to unleash a
sweeping biotic attack on their unsuspecting targets."
Destroyer: "The Destroyer's T5-V Battlesuit gives these strong-but-slow
soldiers mech-like protection. Driven by eezo-assisted actuators, these
frontline troopers carry heavy weapons onto the battlefield."
Demolisher: "The Demolisher uses grenades to attack at range and to
terrorize the battlefield. Demolishers can also create a supply pylon
that stocks allies with an unending reserve of grenades and thermal
Paladin: "The Paladin carries a powerful omni-shield onto the
battlefield to block enemy fire. The Paladin also uses the shield as a
heavy-melee weapon that, when modified with incindiery or cryo upgrades,
creates a devastating combination attack."
Shadow: "Shadow infiltrators use implants to dramatically improve
agility, making them slippery combatants on the battlefield. Their
monomolecular blades are a menace from cover and close range."
Slayer: "Slayers use implants to dramatically improve mobility. Their
dizzying sword attacks can hit multiple opponents, and the Slayer's
ability to slip fire makes them hard to pin down on the battielfield."
Edit: Release date 17th July