I hardly post here, but I lurk daily. But this preview got me to thinking that Harrison is not Khan nor any other villain that has bee widely suspected.
I think from some of the dialogue in this trailer that its Kodos the Executioner.
Too young? That doesn't have to matter in the context of the story. Kirks line regarding watching him murder thousands? Sounds familiar. And wasn't Karidian English accented? And a 1st season villain?
Oh we'll, he's probably really the Balok puppet come to life for all I know.
Anyway, what do you think?