Re: Speculation: Must the villain be Gary Mitchell, or... ?
I say Cumberbatch is an Augment, hence the Khan rumors. But he's a Starfleet-bred Augment, a Starfleet that's rapidly losing it's way, slipping (wait for it!) ...Into Darkness. *cue apocalyptic music*
Given the hints to Section 31 in the comics, that might just be what happens!
Time is the fire in which we burn