IGN reported that he was approached to play McCoy.
IGN Stroy
Here is another article about it
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To be honest, from what I have read, the script for the movie is a very solid one. If they do sign these actors to play these parts I would go see the movie just to see it even if it is the worst POS ever made. Hell I might even see it twice. TOS is by far the era of star trek that I am most fond of. The writing style, the acting, and with improved special effects (As seen in the remastered versions) the series still can hold its own. What I enjoyed most was that the it was written in a way where the crew weren't afraid to argue and in cases get down and beat each other senseless. It had a solid air of military style with a flare of "we are ambassadors and we come in peace but if you're looking for a fight, we can accommodate you." It was a universe full of real challenges, it had heart and character. In later versions of ST, such as TNG and Voy everything was replaced by this BS Utopian ideology where everyone was friends and such. Until later episodes of TNG where they finally turned back toward reality a bit, I really didn't enjoy it. Conflict of spirit and life is what defines a good writing and separates the weak stories from the strong ones. Conflict about right and wrong, depth of character, and fate when written well make for some excellent TV. You don't have to have wars, just a simple mistake and a trip through the Guardian of Forever back to 1938 is all you really need. Or a single ship sent on a mission to test the defense of an enemy only to be pulled into a cat and mouse game of life and death. An old enemy coming for after you for a dish best served cold, makes for a great movie.