Not according to KHII's in-game material; I haven't read the extra material anyways, nor have I played 179.
Speaking of Days, (SPOILER)Xion actually figured out Xemnas' true plans and told Roxas to stop him.

Also, check out what Xemnas had to say in the Secret Reports, Day 358...

"With luck, we can bring Roxas back into our fold, but even if Sora should awaken, as the hero of the Keyblade, he is bound to keep unlocking hearts. If he should come to target us, we need simply subdue him and use his powers ourselves once more. I must become one with Kingdom Hearts. I will become a higher existence. All of my true ambitions begin there. "

Once again, he never planned on getting his heart back, and he duped the rest of the Organization just to get what he wanted, which is to become God. In fact, he actually sent Saix to his death when Saix asked him if he could "end this charade." Apparently, the Organization was also full of traitors besides Marluxia and Larxene, and Xemnas knew this the entire time.
Normally, I'd advocate using out of game material to support arguments, but when it comes to Nomura, my willingness to accept it is 0%.
But that doesn't mean that it isn't true, or that I'm wrong.

Please use Spoiler Tags PuPu, some of us have not played 358/2 ~WK