Mundo Deportivo says that Villarreal is ready to indicate to Marin for the rest of the season.
The Spaniard joined Napoli in the summer from Real Madrid, with the case as an option to buy.
It is understood that the Real is satisfied with the possibility of Marin returning to the League and Villarreal.
Real still see Marin as a potential future player and management believe the move will be good for his development.