I've been a Trek fan for 40 years and have never even noticed a guy named Harrison in TOS. If he's meant to be that same obscure to the max character than Orci's comment was quite assholish. Of course they could be pulling a Miranda Tate thing here (see The Dark Knight Rises) and tricking us with the Harrison reveal. Eh, whatever...no big deal. As long as the bad guy's cool I don't care who it is.