The Keeper wrote:
Fact is, villain or not, code-name or not, they DID pick some random background character from TOS; John Harrison
No they didn't. They just picked a generic name (note the original character does not have a first name). Lots of fans too eagerly try to connect the dots. They think some nobody crewman is going to have significance in a blockbuster movie. They need a reality check. It's either an established character or a new one.
If Orci's comment that the character is canon is to be trusted, then it's likely that Harrison is a pseudonym for a character that's a bit more well known. He's not going to be some nobody.