AND FROM WIKIPEDIA#3: Scrin & Epic Units
Reaper-17
Themed as the heavy “shock” faction of the Scrin, with heavy vehicles and better harvesting operations. The trade-off for all of its ground power is the lack of air units, except for Storm Riders, and no Mastermind unit. There is an upgraded Gun Walker called the "Shard Walker", and the "Reaper Tripod" which converts Tiberium into extra damage in the same way the Devourer Tank can. An "Attenuated Forcefields" upgrade for Seekers and Shard Walkers is available at the Nerve Center. Another upgrade is "Conversion Reserves", which allows for Reaper Tripods and Devourer Tanks to store more absorbed Tiberium. Reaper-17 has a new structure called the "Growth Stimulator", which functions as a normal Growth Accelerator in addition to providing a steady stream of income like a Tiberium Spike. Reaper-17 Harvesters come with shields of their own.[6]
Traveler-59
The polar opposite of Reaper-17, Traveler-59 focuses on speed, teleportation and mind-control. It features new "Stalker" and "Cultist" infantry units, as well as an upgraded Mastermind unit called the "Prodigy". Stalkers are fast infantry, and have the "Agitate Tiberium" ability that damages Tiberium utilizing units or structures. Cultists have no regular attack, but can control units and structures just like Masterminds and have no build limit, but cannot take over air units. Their Mastermind receives area-of-effect mind control and a personal blink pack in addition to its old abilities. Traveler-59 doesn’t get Devourer Tank units, however their Seekers are upgradeable and the "Traveler Engines" upgrade give all units a speed boost. Traveler aircraft are cheaper compared to the other two Scrin factions.[6]
[edit] Epic units
Each faction will have a unique hero-type "Epic Unit" designed to wreak destruction on the battlefield. The epic unit has a structure just to create it and will be very expensive. The MARV and Eradicator can have 4 squads of infantry garrisoned into them, the Redeemer is limited to two. The infantry will create turrets on the Epic units, but cannot be un-garrisoned.
* GDI: A massively armored and heavily armed (it sports a three-barreled railgun weapon) vehicle named the MARV (Mammoth Armored Reclamation Vehicle), which can instantly harvest and process Tiberium by walking over it, giving the player a immediate cash bonus. It has four garrisonable hardpoints in its four corners, the ability to crush any vehicles, even tier 3 units such as the Mammoth Tanks, Avatars and Annihilator Tripods.
* Nod: A giant quadrupedal walker which looks like the bigger version of the Avatar warmech named the Redeemer which garrisons infantry to increase firepower and specialization (militant squads - heavy machine gun, militant rocket squad - missile pack, saboteur - self repair pack, Black Hand - flamethrower turret, recent pictures have also hinted at being able to garrison fanatics and shadow teams).The redeemer's special ability is to be able to charge up a rage generator in it which when used, will make all enemy units attack their allies. It's Standard weapon is a triple-barreled laser-rifle. [9]
* Scrin: A massive spider-like biomechanism named the Eradicator Hexapod which gains credits by processing the hulks of destroyed enemy units. Utilizes Plasma Discs. Like the MARV, it also has four garrisonable hardpoints. Few details have been released about what garrisoned infantry turn into; it is known that the mastermind allows it to teleport itself.
Epic Units will have an "interesting" role in the Global Conquest Mode, able to be strategically placed on the global map between missions.