You may well be right Chris. But I can’t see why a manager can’t be announced today. Players could be simply phoned and told, or not. No issue. I’m pretty sure I’ve heard new managers interviewed saying “I’ll meet the players tomorrow”. It’s not a given they have to be around and meet the new man before he's announced to the public.
In fact, it would be pretty hard to keep it a secret for a day if he’s been chosen, and a day later all the players are called in for a meeting first.
I’ll be hoping for something announced today and the players having 2 full training days of input from the new coach. But not holding my breath.