That is just a news that has no credibility and I do not think Manchester United will let Zirkzee go in the next transfer window. Amorim's arrival has been linked with the release of several players because they are considered not to suit his style of play but I do not think the new manager will do that before exploring the quality of the players he has.
Zirkzee's form has not been so outstanding because he always gets rotated when playing and I want to see how the arrival of Amorim can help him find his best form like his performance at Bologna.
Then lastly, talking about Amorin, I think that his greatest challenge at Manchester united is going to be the expectations placed on him, especially now that rud van nistelrooy left the club in good shape, expectations will definitely be high, so I believe that his job would have been much more easier if he had took over from Eric ten hang directly than rud van nistelrooy, because they are now in good shape, so the fans will be expecting more, not anything less from what rud van nistelrooy did in his short caretaker role at the club.