You can't write spec banking on a set specific actors. Pine may not want to go back to TV, he might not want to be Kirk after the next movie. You never bank your story on the casting.
That's one of the first things that struck me in the OP. Stephen Fry ? Why call it from the get-go ?
You and about every other asshole wannabe knocking of their door.
There's really no need to be rude, though, Seer