Therin of Andor wrote:
I guess because the writers deliberately teased about Khan, Klingons and "a returning character, previously established in Season One of TOS", although they certainly didn't suggest the returning character was the villain.
I don't think they deliberately teased about Khan. I think that tons of reporters were slavering all over them asking "Is it Khan? Huh? Is it? Is it? Aww, c'mon, tell us!" at every opportunity, and every time the filmmakers honestly replied, "We're considering a lot of possibilities but we haven't decided yet," and the reporters were desperate to manufacture the appearance of a story, so they twisted that into FILMMAKERS CONFIRM IT MIGHT BE KHAN! One of the most important rules of defensive newswatching is paying attention to the difference between the interviewees' words and the words the interviewers try to put in their mouths.