Jose Mourinho chose to sign more proven strikers rather than develop Martial & Rashford and it didn't work well for their development.
I agree that both Martial & Rashford are still young so they will have up & down. However, our plan right now is playing the young players who have a lot of talent & potential so they can be well developed and in a few years ready to be the star for our success. When we didn't sign a proven striker this summer, our plan seems to be that we are going to give both Martial & Rashford a chance for our long term success.
Zlatan is not a type of player who will come here and sit on the bench as backup of Martial and beside our style of football is playing pressing, counter with pace, Zlatan just doesn't suit the style that we are playing. I would say no to this. I don't mind if he is willing to sit on the bench, be Martial backup & come as a super sub for plan B. However, I know Zlatan doesn't take such a role.