In all honesty, I couldn't care too much about them bringing Khan back. Every Trek movie since 1996 has tried to imitate TWOK in some way that maybe it's time to revisit the movie or character just to get it out of their system.
Rather, it's the half-assed way they brought him back. Orci admitted that they created a new character to be the villain and then named the character Khan. What the hell is that? You create a new character, use the new character.