KotoR 2 tied Revan's story much more heavily with other stories and themes explored in the game. It all starts with a very simple question, why does the Republic exist? After all, people don't just join the Republic because it's cool. The Republic exists for a reason.
The Republic is essentially an economic and military alliance. There is the promise of mutual defense and trade. If you're a member of the Republic, it's much easier to trade with other Republic worlds. If your world gets attacked, other Republic worlds will come to your defense.
So what happens when that promise is broken? What happens if your world gets attacked and none of your Republic allies come to help or it takes them a really long time help? How eager will you be to lend your aid to other Republic worlds when they get attacked?
That question was answered during the Mandalorian War. The True Sith orchestrated the Mandalorian War to reveal the hypocrisy within the Republic (and the Jedi). The Core worlds were slow to respond to the Mandalorian invasion of the Rim worlds and they did not mount a real defense until they were threatened. As a result, faith in the Republic itself was shaken. Republic worlds were no longer willing to fight to defend the Republic or its principles since their so called allies won't fight for them.
That is why Revan sacrificed himself to the dark side. He would either unite the galaxy under his own banner, or he would remind the Republic and the Jedi of the principles that they stand for, have their beliefs reaffirmed once more through the war, and unite to defeat him, growing stronger and wiser through their victory.
The Republic is essentially an economic and military alliance. There is the promise of mutual defense and trade. If you're a member of the Republic, it's much easier to trade with other Republic worlds. If your world gets attacked, other Republic worlds will come to your defense.
So what happens when that promise is broken? What happens if your world gets attacked and none of your Republic allies come to help or it takes them a really long time help? How eager will you be to lend your aid to other Republic worlds when they get attacked?
That question was answered during the Mandalorian War. The True Sith orchestrated the Mandalorian War to reveal the hypocrisy within the Republic (and the Jedi). The Core worlds were slow to respond to the Mandalorian invasion of the Rim worlds and they did not mount a real defense until they were threatened. As a result, faith in the Republic itself was shaken. Republic worlds were no longer willing to fight to defend the Republic or its principles since their so called allies won't fight for them.
That is why Revan sacrificed himself to the dark side. He would either unite the galaxy under his own banner, or he would remind the Republic and the Jedi of the principles that they stand for, have their beliefs reaffirmed once more through the war, and unite to defeat him, growing stronger and wiser through their victory.