If we're going to speculate, I'd say Kim Dotcom is more suspicious based on his tweets. I thought he tweeted some statements indicating foreknowledge of certain leaks, but I never investigated it carefully.
EDIT: I'm certainly not claiming he did anything, I read this as just sour grapes, but look for yourself at a sample - http://imgur.com/a/zv174
I don't know why OP is being down voted. Kim Dotcom tweeted he had early access to the leaks. It feels like a more plausible theory to me than the one the Obama administration is pushing. He announced his attention to be "an Internet Freedom fighter" and "Hillary's worse nightmare in 2016" back in 2014.
There's always heavy downvoting in these threads. Look for interesting discussion to upvote to counter.
Thanks for those tweets, yes, he has done a lot of things that make him at least suspicious. I wouldn't take him seriously at all if not for the fact that he predicted some of this.
Incidentally, for those mentioning McAfee, I see no reason to take that guy seriously, nor am I presently aware of him displaying any foreknowledge of any of this.
What indication do you have that it wasn't?