…It's obvious that Roberto Orci, way back when he gave the interview in which he said/hinted that Cumberbatch's character was from established TOS lore, did a classic switcheroo by telling us that Alice Eve's character was new to canon and Cumberbatch's character was taken from TOS lore when the opposite is actually true.
Now that’s a stretch. Remember that Orci later commented that he misspoke with regards to one of those characters. Clearly Cumberbatch is Harrison the extra from TOS; Orci misspoke about Alice Eve cum Carol Marcus being a new character.
Not to be too gauche, but I must recant my above argument, at least in part. I now am of the opinion that rather than Redshirt Harrison from TOS, John Harrison is in fact Johnny, the kid on the side of the road at the beginning of Star Trek
(2009). Frankly, this scenario makes much more sense than J.J. having bombed the typecasting of a Star Trek
(the original series) extra-cum-supervillain.