I like the general idea. But I do have some problems with it.
First, his basic ability. Cooldown increase on a basic with no conditions? That's way to powerful. It's so good at stopping the enemy team that it's actually a punishment to use any of his specials. That really shouldn't be. The zeta on villain gives him an undispellable and unpreventable Retribution for crying out loud.
Second, I don't like his leadership. Thou for the exact opposite reason. Its too situational. Which makes it rather weak. The zeta does help bring it up again. but still. remove 20% turn meter at the start of the encounter? That's hardly ever going to be used. And even when it is, it isn't going to outrun those that start with turn meter. On top of that revan is immume to stun, which makes a part of his leadership completely useless for himself. Since you are marking allies with one of his ability's, maybe give immunities and bonus stats to marked (sith) allies?
Third, The names of the ability's (specials and basic) They are a bit too generic. Thou I don't have any suggestions at the moment for this. On a side note. Revan was known as a legendary duelist and you have a picture of him with 2 lightsabers and none of his ability's have anything to do with lightsaber combat. That is just a missed opportunity.
What I really do like about this kit is the idea of weakening and sacrificing allies to strengthen and heal Revan. That is really clever and unique. I think you need to focus more on that with this kit. Remove the bonus damage for each active ally on his ability's. also, why on Force Crush do you inflict Marked on an ally that already has it. And why only that ally grants him 100% health and protection when defeated. Why not add that to Villain whenever any marked ally is defeated. Why limit yourself like that. It makes no sense.
Like the overal idea but I think you should focus more on the weakening of others to strengthen him. And tone down the basic. just make it always inflict damage over time and add some condition to the cooldown increase. If yo don't remove it at all.
Still an awesome idea.