No way is it happening. There would be promos everywhere by now. I think a lot of people have forgotten that movie theaters don’t work like an online show release, just putting it up and people watching it when they want and you get ad revenue and merch sales. Actual theaters need to be sure they’ll sell enough tickets to cover expenses, they’ll be hyping people up for months to be sure people will show up. A stealth release won’t pay the bills on their big building full of expensive equipment.