I'm wondering why you chose the credits order you did. I really doubt Yelchin would get the "and" credit at the end -- that's considered a prestige position second only to top billing, sort of a "special guest star" slot. Logically (to coin a phrase), that would be where Nimoy's credit would go.
Aside from that, were you going by the relative prominence/prestige of these actors? I suppose one could quibble about the order for that. I kind of suspect that, aside from Pine, Quinto, and maybe Urban (and Bana, of course), they might get alphabetical billing, like the original "back four" did in the movies (they were always billed as Doohan, Koenig, Nichols, Takei).
To be honest, I'm not even sure Pine will get top billing. Sometimes the bigger actor (or the one with the better agent) gets top billing regardless of who the main character is. Heck, Christopher Reeve got third billing in Superman: The Movie, behind Brando and Hackman. Although I guess there are no Brando and Hackman equivalents in this cast yet (unless they get someone like, ohh, George Clooney as Pike, which I think would be a great idea, by the way). Come to think of it, it's possible that Nimoy would get top billing, with the final "And" credit going to someone else. And given that this has been described as a Spock-centric story, it's conceivable that Quinto would get billed above Pine.
Not trying to be nitpicky, just using your conjectural poster as the launching point for discussing these questions.
