Yes, I am quite sure this training flight never happened. Not one article I have read stated that it did happen. All the articles say the training mission was supposed to happen, or, it was scheduled to happen. There is no mention of this training mission ever taking off.
To think that these pilots on the training mission watched the alert aircraft take off is out there with the rest of your theories. You can’t even see Otis from W-105.
"Pilots Continue Preparing for Training - Once the two alert fighters are airborne, the pilots on the ground continue preparing for their training mission. “Back on the flight line,” Richard will recall, “I arranged my formation for takeoff and followed the standard procedures en route to our training area southwest of Martha’s Vineyard.” [Richard, 2010, pp. 12] Richard and the other pilots WILL BEGIN their training mission in Whiskey 105 (see (9:00 a.m.-9:24 a.m.) September 11, 2001). They will only learn of the first crash at the World Trade Center and BE RECALLED to their base at around 9:25 a.m. (see (9:25 a.m.-9:45 a.m.) September 11, 2001), and some of them will take off again to help protect US airspace, but that will only be after the terrorist attacks have ended (see (10:30 a.m.) September 11, 2001 and (Shortly After 10:30 a.m.) September 11, 2001). [102nd Fighter Wing, 2001; 9/11 Commission, 10/14/2003 pdf file; Spencer, 2008, pp. 244-246] "
I'm glad you're quite sure. I guess that means my other 'theories' aren't that "out there".