Episode 9: The True Nature of the Force

Leia and The Emperor
Leia pilots the Falcon to the Emperor's citadel after arriving on Byss. After she, C-3PO, Han and Chewbacca got off, Salla and Shrug took the Falcon to a safe place. The four are brought before the Emperor and Luke. Despite trying to fight back, Leia was rendered unconscious and was brought to Palpatine's quarters to be turned. There, she discovers that he holds hostage an even greater treasure: a mysterious and intelligent artifact called the Jedi Holocron, which the Emperor had stolen during the Great Jedi Purge from Ashka Boda. With both the Holocron and Luke Skywalker under his control, the Emperor would appear to reign supreme in the Force. He reveals he plans to overshadow Leia's third child stirring in her womb as his next new body. In anger, Leia toppled Palpatine from his bed and stole the Holocron. She finds Luke, who claims he is free of the dark side, despite his eyes continuing to shine yellow. Meanwhile, Shrug and Salla got control of a Hunter Killer patrol droid to blast Han and Chewie free. After bring joined by Leia, Luke and the droids, the Falcon takes off from Byss. However, Luke reveals that he had cast an illusionary projection of himself to make them believe he had boarded so they would escape.

The Rebillion of Luke Skywalker
The real Luke Skywalker then marches into the clone lab during Palpatine's last few moments before the transition. When he reveals his purpose, Palpatine allows his current incarnation to die, hoping to reach one of the clones before Luke destroys them all. Luke proceeds to go on a destructive spree through the lab, hoping to beat Palpatine to the clones. Unfortunately, he misses one.

The newly resurrected Palpatine scoffs at Luke's attempts to vanquish him. When Luke attempts to subdue Palpatine, the Sith Lord seizes one of the lightsabers he keeps stored in the lab and engages Luke. Despite his valiant efforts, Luke is disarmed and held at blade-point. Palpatine proceeds to complete Skywalkers turn to the Dark Side, reducing him to an obedient watchdog.

Second Battle of Mon Calamri
Meanwhile, on Mon Calamari, the Devastators were still invincible and launched again in a second attack. Luckily, Luke managed to install a code into R2's memory banks to shut down the Devastators. Though the great war machines were down, their crew somehow powered up the factories until control was restored. But R2 created a new code to make the Devastators recycle each other.

Unfortunately, this was only half of the Emperor's plan. Great new fleets of the Empire were spreading across the Galactic Core and soon the entire galaxy would fall under the sway of the dark side.

Luke Tries to Seduce Leia
Luke traveled with the Emperor to capture his sister, aboard the recently completed and christened flagship, the Eclipse. Prior to the Eclipse's arrival, the Holocron Leia stole from the Emperor delivered a thousand-year-old prophecy to Leia, which tells of her battle against the young Emperor:

As the Eclipse comes out of hyperspace, the Emperor demands to the Alliance for Leia to come to his ship alone, with the holocron; He evens promises to discuss a truce. Despite Han's objections, Leia boarded the Emperor's Eclipse-class Super Star Destroyer. She who appealed to the goodness inside Luke, trying to redeem him. She only succeds in making him want to become the true Lord of the Sith, and he turns on Palpatine, declaring to be the new Emperor. Outraged, the Emperor fights Luke in a lightsaber battle, ultimately losing his hand.

The Last Attack
However, an enraged Palpatine unleashes a titanic Force-storm to utterly obliterate the Rebel Alliance fleet. Using knowledge taught to them, both brother and sister assaulted Palpatine with both the Light or Dark side of the Force, cutting him off from the Dark side and turning the Force storm upon him. The result was the complete destruction of the Eclipse I and Palpatine (supposedly, though his spirit escaped to fight another day). As Eclipse is destroyed, Leia flees to a shuttle.

At first Luke will not leave, having proclaimed himself the new Emperor. He finally boards the shuttle, but at once changes course for an Imperial Star Destroyer. Once safely aboard it, Luke proclaims: "I am the new Emperor." ―Luke Skywalker[src]