Now people say the plot for Obito could be deeper, that he isn't doing all this for Rin. I agree Obito isn't doing it for Rin at all, that is just the reason he didnt tell Kakashi he was alive.
But to say that it deepens towards him helping out Itachi I have to disagree. I believe the only reason Obito helped Itachi is because Uchiha's probably have the power to over come the Eye of The Moon Plan.
Also if your wondering what I'm referring to its the Uchiha massacre