On the subject of Admiral Marcus, how long was he a member of Section 31? Did he join them before or after the destruction of Vulcan?
IF I have the sequence right, Star Trek ID takes place 6 months after the last film. Harrison mentions he was discovered by Marcus after Vulcan's destruction, and he and his buddies were thawed out and used for weapons development. This would imply that perhaps Marcus was already part of Second 31 at this point. Also Marcus' ship had probably been in development for a while as large as it was.