This coming summer Chelsea will certainly be a more attractive prospect to join. If Costa goes to China for €120m as has been widely reported the club will have somewhere on the order of €250m to potentially spend. Assuming Lukaku costs €75m then there's still €175m to spend in reinforcing the squad-for me a goalscoring box to box CM is needed along with depth at the wingback positions. Potentially a left footed right forward as well who likes to come inside to create space for wingback overlaps...Dybala or Griezmann?
I'm personally not sold on Sanchez; he's a class player but I don't think he'll age well. I'd be reluctant to spend the rumoured €50m on him personally. For me the dream summer would be something like Dybala (€120m), Nainggolan (€30m), Lukaku (€75m), Sidibe (€25m), Christensen (free). I'd also probably sell Willian, with Pedro assuming his role coming off the bench.
--------------Courtois----------------
Azpilicueta----Luiz(C)---Christensen
Sidibe--Kante---Nainggolan--Alonso
---Dybala-----Lukaku-----Hazard---
Subs: Begovic(?), Moses, Fabregas, Matic, Pedro, Zouma, Ake
For me that's one of the best sides in Europe, capable of challenging on multiple fronts and playing a wide variety of styles.
It sure would, it's a shame there is close to no chance you'll have that team.