This is my second post, so please, no newbie flaming....Anyways, the theory that stuck out in my mind was that Kakashi was Jiraiya and Tsunade's son. I don't think this is true because there was a war going on when Kakashi was born, and Jiraiya and Tsunade were a main part of that, so unless they just snuck off for a quickie....nevermind. So it would be kind of difficult for them to have a child in the middle of a war, PLUS we are pretty certain that they never hooked up because Jiraiya is always saying about how he was so close to getting her to go out with him. My theory is that Kabuto will try to kill Sasuke but will die in the process, leaving Orochimaru alone to look for a new lackey. Another popular theory i've read about is Kakashi copying the Gates from Lee, or maybe just knowing them. i need one thing cleared up though, did Kakashi use his Sharingan when Lee opened the Gates? If so I believe that it was jus to keep up with the movments and analyze what Lee was doing, not to copying the move (which I believe is uncopyable ). Anyways that's just my two cents.

Karma