theories

[Destai]

I agree with the suggestion know that Riku has learned to control his darkness and his light he may well reclaim his title as "a" not the keyblade master. I think its entirely possible that riku and mickey are genuine organization members. The ones in Castle Oblivion were all rogue agents and the main interest in the organization is to study the heart which works perfectly for Riku and mickey.

First off, if the ones in Castle Oblivion were all rogues, that means that 50% of the Organization are rogues. Also, Zexion and Lexaeus didn't seem to be rogues, they were just countering Marluxia's plan. Axel is definitely a rogue, but his objectives are still unknown. Only about half of the Organization members in the castle were part of the plan to overtake the Organization. Marluxia, Vexen, Larxene, and Axel (though he's not really a part of it). Also, what would be the point in taking over the Organization? If the Organization is about a dozen people who are trying to study the heart, why would they be squabbling amongst themselves as to who is in charge? It just doesn't make much sense to me...

Yes Zexion and Lexaeus were counteracting Marluxias plan trying to control darkness as opposed to Light. Axel is not definitely a rogue. He could and couldnt be. CoM never made it clear why he killed Zexion and it could easily be because he saw Zexion controlling Riku the same as Marluxia controlling Sora. The game didnt make it clear and I dont think it was meant to be clear. Yes it probably doesnt make sense to you or anyone besides the people creating KH2 right now why anyone would want to overthrow the organization. Its pretty possible that by the end of the game Axel, Larxene, Vexen, Marluxia, Zexion and Laxeus were all rogues.