I wonder if the next movie could take a lesser known race and bring them in?
After all, how much do we really know about for example the Tholians? May be seen as a risk and just "pandering to the fans" (another phrase I hate!), but they have a practically untouched canvas to paint on there.
It would be cool. You know what would be cool too... If they could take a hated episode like Spock's Brain or a hated film like The Final Frontier and re-imagine it into something ultra-cool... It would be an amazing feet......