Actually, I'd wager only Kirk and Spock are recognized in any significant way among the general public. Fans of anything (a rock band, a writer, a TV show, a sci-fi franchise--possible exception of Star Wars, a sport, etc.) usually strongly overestimate the general public's knowledge of their particular object of attention. If the goal of the filmmakers is to maximize "butts on the seats" ahead of all other considerations (something that is frequently the case, but not always so), then Kirk and Spock will be at the centre of any iteration of Trek for the foreseeable future (whether Abramsverse or some other incarnation). None of the other series ever generated characters that surpass, or even equal, Kirk and Spock in recognition factor. At present, that pretty much nixes any spin-off movies/revivals.