If ever Mou decides to sign him, terms will be different this time around. He will be assured a spot in the squad. Maybe not all the time in the first year since Ibra is around, but after it he could probably be no.1 in the pecking order at the no.9 position.
If manchester united going to turn themselves into chelsea then that will be what they will need to do. There is no point in signing all the top star if you are just going to park them at your bench. Obviously ibra and rashford is enough for manchester united and if they need extra then martial could be their striker