Some more Star Trek nerdism for you..
Apparently there was a big hoo-hah in the Trek community at the time because word was leaked that Spock gets killed.
So they put in the first scene in the simulator room where he is 'killed' by the Romulan attack. An attempt to put people off the scent...
Only know this cos I watched the Blu-Ray with directors commentary only a few weeks ago.
Come and get it cumslingers!