I thought I would start a thread as to why Kirk may be wearing a black tunic that, according to the article, is integral to the plot.
Here is my theory - he as been promoted to the rank of Captain, but does not yet have a command. he may be on the Enterprise to apprentice with Pike but with no authority, just an observer since Starfleet considers him so young. However not to confuse the crew, he cannot wear his departmental tunic that carries his rank, just the black tunic as a representation that he does not belong to any one department, cannot issue orders and is not officially assigned to the ship.
Here is my theory - he as been promoted to the rank of Captain, but does not yet have a command. he may be on the Enterprise to apprentice with Pike but with no authority, just an observer since Starfleet considers him so young. However not to confuse the crew, he cannot wear his departmental tunic that carries his rank, just the black tunic as a representation that he does not belong to any one department, cannot issue orders and is not officially assigned to the ship.