Okay so this came up in a game recently and I tried to search for the answer but didn't come up with anything solid.
Keyan Farlander has Stay on Target and starts the turn stressed having used it last turn and not gotten a shot off to clear it. He then picks a green 2 forward which he uses to turn into a 2 bank using Stay on Target which is now red... What happens now?
I suspect the answer is that the opponent gets to pick any non-red maneuver for the B-Wing to go on instead as stress isn't cleared until the check stress step which is after movement, but does switching to a 2 bank in this case count as "revealing a red maneuver".
May sound strange but I couldn't find a clear definition of "revealing" a maneuver when you change it after you've revealed your dial.