MTV's blurb with their run of the pics is correct...that IS a Starfleet insignia on Cumberbatch's shirt...
Here's an enlargement of one of the TrekCore pics, the one of Quinto and Cumberbatch with their stunt doubles:
Look at the stunt double's shirt...it's the same kind of black tunic that Pine wore through most of the first movie:
Never keep a Vulcan waiting...
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