Ronaldo and Bale on the wings; Benzema striker; James attacking midfield; Modric/Alonso behind James alongside Kroos. However I wouldn't be suprised if either James or Kroos are sacrificed for a more defensive setup, ie. Modric and Alonso in deeper holding roles.
Either way Madrid are going to tear teams apart next season. Let's hope their defense steps its game up - if it does, I can't see any team containing them.