I've reached out and have been told The Union is not aware of anything regarding the rumors, but drivers in other buildings insist that they've been approached by Management and shop stewards and it's already occurring in other buildings.
It makes more sense to me that someone in Management is stirring up the

storm just to get some Air Drivers to panic and sign up for the 22.4 slots.
I'm more curious whether anyone anywhere else has seen or heard anything similar elsewhere. My instinct tells me it's BS, but I've been wrong before.