I would imagine that Brailsford would have, or at least be working on replacements for Ten Hag already. I can't see him going until the summer, as the new 'football' owners take full control which is approximately 2 months, so beginning of March, so the current manager has until then to prove that with all his missing players available again he can get United playing good football, which hopefully would translate to wins.
I'm not certain that he can.
We seem so easy to play against, which was so obvious from the first game against Wolves he should have beaten us comfortably.
I'm hopeful that Brailsford, somehow, can select the right man (I don't think United are ready for a female manager, yet). There are a number of names that appear to be in the hat, but it's so important to get a manager that can develop a culture of good attacking football, keep bringing academy players into the mix, and create a happy workplace that everyone loves to be involved in.
With Ratcliffe, Brailsford and whoever else comes in to run the football side, creating a much more football orientated atmosphere, and hopefully creating a buffer between the current regime, and the football side, it would certainly help a new manager.