Lord Starkiller

Born Galen Marek, after killing Darth Vader in the non-canon infinities story, Marek took his place as the Emperor's apprentice. After gaining his new armor and knighted, Lord Starkiller, he was now the Supreme Commander of the Imperial Fleet, replacing Vader. The events of the Original Trilogy play out as normal, only with Starkiller altering certain events. At Tatooine, Obi-Wan Kenobi dies before his time at the hands of Starkiller, the infamous Boba Fett is defeated, and Jabba's Rancor is taken out a bit too early. At Hoth, unlike Vader waiting til it was safe to land, Starkiller leads the battle on the frontlines, and manages to capture the Millenium Falcon and confront Luke Skywalker.

Vision
Starkiller's first appearance was in a vision to his former self, Galen Marek, at the old Jedi temple on Coruscant. In this vision Starkiller battled Marek, occasionally morphing into Marek's other possible future as a noble Jedi Knight. After Starkiller's helmet is removed, the Sith Lord throws Marek off the balcony they are on, hurling boulders at him with the force, not anticipating Marek using them to climb his way back up, and then impaling Starkiller, throwing his body into the dark abyss below. Starkiller would comment to Marek that he would never escape this future.

Reconstruction
After killing Darth Vader, Palpatine promised that he would become his apprentice, and finally become a Sith Lord. All he had to do was sever all ties to the Jedi, and to do this, he had to kill his Jedi Master, Rahm Kota. After a few moments of deliberating, he struck at Palpatine, who blocked it with his own blade, forseeing that Marek would do this. He threw him onto the landing platform, just as the Rogue Shadow was preparing to land. Marek saw that the Rebel Alliance senators were already dead, then Palpatine used the Force to grab the Rogue Shadow, and bring it crashing down to the throne room, killing Juno Eclipse and Rahm Kota, but Palpatine and Marek survived, though Marek was barely alive. He awoke in the Emperor Palpatine Surgical Reconstruction Center, in a new life support suit which was probably the only reason he was still alive. Marek's vision had come true.

Hunting the Plans
In 0 ABY, the Rebel Alliance stole the secret plans to the Death star, and tried to escape in the Tantive IV, but were captured by Starkiller and his Imperials. They suspected that the plans had been hidden in two droids that escaped to the nearby planet of Tatooine. Starkiller himself traveled to the desert world to hunt the droids. Making his way to Jabba the Hutt's Palace with the aid of his master and Captain Bellows, he tried to bargain for information on the droids, where a blunder on the translation droid's part revealed to Starkiller that the droids had been spotted at Docking Bay 94, Mos Eisley. Jabba was furious and threw Starkiller into the Rancor Pitt, where Starkiller managed to kill the creature and escape the Palace with his old droid's help. However, Jabba placed a bounty on the Sith lord and was attacked by Boba Fett. after a lengthy duel, Starkiller hurled one of Fett's own rockets at him, defeating him. Traveling to Docking Bay 94, Starkiller found the droids with a farmboy, that the force was strong with, and Obi-Wan Kenobi, the legendary jedi who he had battled many holograms of in his training. After Obi-Wan and Starkiller's duel, Starkiller stabs Kenobi in the shoulder and throws him into the Millenium Falcon's engine. Starkiller was surprised however when Kenobi's spirit attacked him, but using his mastery of Force Lightning, taught to him by Palpatine, he temporarily vanquishes Kenobi.