- Hard to tell whether Scotty's run-in with NCC-0509 happens before or after the 'flashback' sequence of Countdown Into Darkness. If the latter, why is Marcus still a commander and why is he on Earth on the Starfleet Academy commissions board?
It's likely before. Its crew are wearing the same uniforms the Kelvin crew wore in Trek XI while the flashback in Countdown to Darkness had April and his crew wearing the "modern" uniforms.
I guess Marcus could have been on the Academy Admissions Board before he served with April, kind of like Pike in Trek XI. Or maybe they weren't thinking when they wrote the line and didn't realize the mistake they were making in inserting this particular easter egg for the movie.