I am pretty sure United would be getting Douglas Luiz only if they can't finally get the Mbuemo deal done. No idea what took them that long, but they have been dealing with that for nearly a month now I think, which means we are not going to really see them have anything further.
If Douglas Luiz thing is real, 25 million is cheap for them, since they are looking for a 70 million deal with Mbuemo, and that is why I am pretty sure we are going to end up with cheaper version. They just wanted someone who is not as good as the one they already have at premier league, which means Mbuemo is better because he proved himself at premier league already this season. Lets see, I still say neither should be who they are looking for, and they should be looking for someone with a bigger name and proven at high levels.