Ronald D Moore would be an excellent choice for a writer/director.
How about coaxing J. Michael Straczynski away from writing bad Marvel Comics and have him try his hand at Trek? :-)
Too close to the bad stuff of the last few incarnations (even if his stuff was good)
* Star Trek: First Contact (1996) (screenplay) (story)
* Star Trek: Generations (1994) (screenplay) (story)
* Star Trek: The Next Generation - All Good Things... (1994) (TV) (written by)
Plus way too many Branon Braga ST shows.
Someone new needs to come in an revive the franchise. I like the JMS idea, but I doubt he'd do it.
How about letting Niven and Pournelle loose on the Trek universe? Or invite William Gibson to take a crack? How about Michael Crichton? The mind boggles.
Now, what would John Ringo do with Star Trek? Or David Weber. Or we might go full goose bozo and go old school and turn the franchise over to someone like David Gerrold. And Nicholas Meyer is still around. He saved the franchise once...