From what I've seen in pre season, Ole's gona play a double 5 with a line of 3 futher up the pitch and an out and out striker, which to me, as I've been saying, makes a lot of sense to Ole's approach and brings back a little bit of balance which we were lacking a lot.
As per today PP and McT are going to play together with Pogba being allowed (and tasked to) to come up forward more often than not when in possesion. The line of three should be the ones who perform the high pressing style we've been said Ole is implementing, there must be dynamism and hardwork, a lot, thats why I dont see Pogba or Martial playing in that zone. If Ole where to be coherent with the approach we could see Rashford playing on the wing more often than not and Martial lurking arround as a mobile nº 9.
CAM and RW are concerns to me but atm Lingard and Pereira have shown they can press and release the ball (not much more than that tho). I fully expect one addition in one of those positions, being Fernandes the most mentioned one (whom from my point of view suits very well that system).
That said, definitely we lack a proper CM/CDM to play that McT role, either to cover or to upgrade. Milinkovic-Savic is a proper player able to fit that role.
Expected midfield:
M-Savic -- Pogba
Lingard/Pereira -- Fernandes -- Rashford