N could by Kyurem. Team Plazma takes Pokemon away from people to set them free, but N encourages you to get the main legendary of the game. It's like he's doing the opposite of what he's supposed to do. Mayebe he was trying to get Zekrom & Reshiram caught by trainers who won't see each other much at all. That way, the can't fight. That right there could be part of something else, too. I don't know what, but Gray might have something like that....
N could transforms into Kyurem when his plan fails, as both Dragons are released. Then, N or should I say Kyurem has to stop Reshiram and Zekrom's fight. Also, you don't see N after the events at N's castle, but that's when you get Kyurem...
N could be Zoroark, as both event Zorua and Zoroark are transformed into people when you encounter them.N has a Zoroark, so could it be related to N being one? In the opening of the Black and White games, he has a Zorua when he's a kid so he has raised it since he was little. Zorua and Zoroark are known to trick others, so that could be why N is so smart.