I agree, it's not going to happen, but it would be nice to make Spock a little mysterious again. He's so familiar now, and with filmmakers' ability to create really alien-looking aliens now, Spock just looks like a human next to them. Of course, there's the fact that Spock is half human. In a future production you could have Vulcans with really severe features, whereas Spock would look like a human with pointed ear. He would be obviously different from both humans and Vulcans, isoated from both. It might make for an interesting character dynamic, and make him seem really alien again (a race of one, by his reckoning) in an age when we could have other crazy-looking aliens walking around in the Enterprise corridors.