Megatron

"Let that be a warning to anyone who dares cross a gladiator of Kaon—be they Decepticon...or Autobot!"
 * ―Megatron [src]

Darkness, Rising Part 1
In Darkness Rising, Part 1, Megatron returns from searching the void for three years. Megatron found something better than mere warriors: he discovered a new source of Dark Energon, the "blood of Unicron", with which he could reanimate fallen Transformers as an army of the undead. Returning to Earth and resuming command of the Decepticons, Megatron tested the Dark Energon on the deceased Autobot Cliffjumper, reviving him as a zombie "Terrorcon" that slaughtered several Decepticon Miners, but which posed no threat to Megatron himself. Unfortunately for Megatron, this partial reactivation of Cliffjumper's lifesigns drew Optimus Prime's Autobots to the Decepticons' mining operations. Deciding it was not yet time for a confrontation with Prime, Megatron withdrew aboard the Nemesis and continued to brood over the Dark Energon.

Darkness, Rising Part 2
added

Predacons: Rising
added

Friends

 * Starscream


 * Soundwave


 * Shockwave
 * Silas (formerly)


 * other Decepticons
 * Predaking (currently)-(formerly)

Autobots

 * Optimus Prime

Mech

 * Silas

Predacons

 * Predaking

Weapons

 * Fusion Cannon
 * Blade-like Weapon
 * Dark StarSaber