Di María is playing great and, on op of that, he now has the same role in Real and in NT. Only problem is that role demands a lot of stamina, especially to keep him active on defense. He has it now, let's hope it lasts till mid-july :P
Believe it or not, our most probable lineup is:
Zabaleta, Garay, Fede Fernández, Rojo
Mascherano, Gago, Di María
Messi, Higuaín, Agüero
Gago is injured and Banega is so-so at the moment, so it's unclear what will happen in midfield. Agüero or Higuaín could be sacrificed for an additional mid at times, but unlikely if fit. Sabella has used players like Maxi Rodríguez or Sosa for that. Biglia is usually Mascherano's substitute, but he's been used as 4th mid as well, mostly when winning.
But if you get me started on our coach choices, we could run this thread off topic forever :P