Re: is "Into Darkness" Quinto's last as Spock?
Since Quinto was so excited about playing Spock in the first place (IIRC he said he was born to play Spock and lobbied heavily to get the role), I don't see him giving it up.
It is by caffeine alone I set my mind in motion. It is by the beans of Java that thoughts acquire speed, the hands acquire shakes, the shakes become a warning. It is by caffeine alone I set my mind in motion.