SIAP John Harrison?
But, probably bull shite. From the comments:
a friend of mine on facebook figured it out as follows: he wrote "This is a total stream of consciousness thing, so bear with me... The official cutline for this photo (cool brig, by the way) identifies Benedict Cumberbatch as "John Harrison." That's obviously a false flag, because they would never give this information away so callously when they've worked so hard to protect it. So... who is "John Harrison," really? Well, it's the name of the writer/director of the 2000/2003 "Dune" remakes, so there's a sci-fi connection. Harrison also directed and wrote the score for "Creepshow," which recently had its 30th anniversary. That film's theme song was recently covered by Garth Knight (perhaps you can see where I'm going now). Knight is a homophone for night, which is a synonym for darkness. Garth would refer to who I believe Cumberbatch is really playing: Garth of Izar." That's JUST the sort of convoluted misdirection Abrams would pull.
As you probably deduced from my pissing and moaning in the Star Wars to Disney thread, I'm not what you'd call a "canon loyalist." If it's as awesome as the last movie, I'm cool with whatever they do.
BTW, this "fricking with the canon" experiment has worked very successfully. Expect Hollywood to get more aggressive in fricking with the canons of your most cherished franchises.