If anyone can make Spock's crazy half brother and a quest to find God in the centre of the galaxy AWESOME, it's Quentin Tarantino. And it looks like he's doing the next film after this one. So I say, go for it!
I'd like to see Sybok really eschew the Vulcan way and drop "mutthfukka!" every second sentence. Too bad Sam L. Jackson is too old for the part.
That being said, I'd like to see this casting choice:

"Each man hides a secret pain. It must be exposed and reckoned with. It must be dragged from the darkness and forced into the light. Share your pain with Lucille!"