Lets analyse Mou's four major teams
Chelsea 2004, Inter treble team, Real team and Chelsea's present side
GK: Previous (Cech, Cesar, Lopez, Courtois). Jose always loved a top quality goalkeeper whose tall and dominating at the back. DDG fits the bill.
Def: He tend to opt for a very physical and tall defense with 1 fullback being essentially a CB (Gallas, Ivanovic, Chivu) while the remaining fullback would be given the licence to go forward and do some damage (Ferriera, Zanetti, Maicon, Azipiculeata etc). I can see Mou adding a defensive minded RB (Fabinho?) or buy another CB and move Bailly to RB. Prediction - Bailly------Smalling--------DC---------Shaw
Mid: He tends to like having 2 hardworking midfielders, one being more technical (Lampard, Cambiasso, Xabi) and the other one being hardworking (Khedira, Zanetti, Makalele, Matic). He did broke the rule with Fabregas but he compensated to that by playing Willian and Oscar (he's more hardworking that Mou's typical forward guys). For the former Carrick, Bastian and Blind can do the job. For the latter Schneiderlin fits the bill but we need to add a cover/competitor
Flanks: Its less clear than in other areas however he tends to have a soft spot to direct winger with plenty of pace and an eye to goal (ex Ronaldo, Duff, Pandev and Eto) and a more technical winger (Hazard, Robben, ADM) who provide a lot of assists. For the former I can see Martial taking the spot. Mou may also decide to give Depay a second chance. For the latter role we need to buy a quality player (ie the Mitchi guy from Dortmund?) with Januzaj and Lingard (more of a Willian rather than a Robben) as cover
AM: Its a key area for Mou. He likes his no 10 to be a complete package ie hardworking, creative, a good assist man etc (Sneijder, Ozil, Gudjohnsen, Oscar). Oscar was the less technical of them all. However his workrate allowed Mou to play a creative midfielder. Is that what he's planning by playing Rooney there (ie Herrera in CM maybe?)? Nevertheless he rarely compromise with the role and while he may give Rooney the nod I am pretty confident we'll add another no 10
STK: He just love a top quality striker who can guarantee him goals. He also have a soft spot for tall strikers (Costa, Drogba, Ibra, Benzema etc). Ibra fits the bill. With Embolo (who will flirt between Flanks and Stk) + Rashford acting as cover
So Id say Mou system could be the following
GK: DDG, Romero
RB: Bailly, Valencia
CB: Smalling, CB, CBJ, Rojo, Jones
LB: Shaw, Darmian
DM: Schneiderlin, DM
DM: Bastian, Carrick, Blind
AMR: MKhit guy, Januzaj, Lingard
AML: Martial, Depay
AMC: Rooney, AMC
STK: Ibra, Embolo, Rashford