You are hoping, because that isn't based on recent performances. Has Rashford hit 20 in a season yet? Martial is awfully inconsistent, and Sancho is an unknown to the Prem, and with respect, has had one decent season in the Bundesliga. Note Pep's comments on him.
Why go with a forward line of players who do not have a record of banging in loads of goals on a consistent basis? I love Rashford, but I think Lukaku will score more than him, personally. I would actually like to see them two play more games together. Rashford needs to play off someone at times. Lukaku can drift out wide.. they BOTH need more goals and consistency.
I am not saying Rasford /Sancho/ Martial are not exciting prospects.. and I place Rashford slightly ahead of the other two.. but I want to see United with a proven name up top, and throughout the team. Griezmann. Lewandoski. Benzema. Kane... these are the names I want at OT. Because they are BETTER than what we have. We should not be fearful of signing big name, proven players. Not over the hill journeymen, and not suggesting we buy lots of them.. but we need a couple.