GK: De Gea (although I suspect he'll be at RM)
RB: ???
LB: Shaw (if he makes a full recovery)
CB: Smalling
CB: ???
CM: Schneiderlin
CM: ???
AMR: ???
AMC: ???
AML: ???
STR: ???
Some of the current squad are good enough as squad players though e.g. Blind, Rojo, Jones, BFS, Martial*, Memphis, Herrera, Mata, Rooney (but too expensive / big ego for a squad role)
* Edit: I know some will throw their hands up in horror that I didn't include Martial in the first XI - it's not that I don't rate him (I think he is an excellent player / prospect) just that at his age I don't think we should plan for him to be an "every game" player, we could burn him out / put too much pressure on him. That's not to say he wouldn't get loads of games anyway - with our injury record he'd still probably end up playing most games!