I don't know it, just my belief.
And if we buy Bernadeschi and Costa, I think the plan would be to use them as starters. If we're going to use 4-2-3-1, I believe Max will prefer to use actual wingers - as excellent as Mandzukic was last season.
Not just that, there is a certain trend that this management have that you can almost predict what will they do next.
For example every single season ever since marotta came here he bought an attacker and sold another in every transfer window:
- 16/17 we sold morata and Zaza (loaned out but he was practically sold to Valencia), we brought Higuain.
- 15/16 we let go of Tevez and Llorente and brought Dybala and Mandzukic.
- 14/15 we sold Vucinic, Quagliarella, Immobile Giovinco and brought Morata.
- 13/14 we sold Matri and brought Tevez.
And we tend to do the complete opposite with our 2 center backs, we hardly sell anyone of them (the only one I can think of who was somewhat of a starter and we sold is Ogbonna).
That's why it's isn't hard to predict what will happen next (when there were rumors this summer of bonucci leaving personally I thought that's it's extremely unlikely to happen).