The highly-rated Moroccan international has admitted he would like to move to England, and had been strongly linked with Arsenal and Tottenham in recent weeks.
But Nicollin has now revealed that Villa are currently the only bidders from the Premier League for the 23-year-old, who is set to leave the Ligue 1 outfit.
"He is leaving," Nicollin told LeSport10. "There are four or five clubs that have come in. It is now down to the player to choose now because we are almost in agreement with the clubs. He will leave for 14-15 million euros."
Asked if the offers were concrete, he replied: "Yes. From AC Milan, Inter Milan, Atletico Madrid, Galatasaray and Aston Villa.
"We have no problem now, he [Belhanda] has the authority to agree with whoever he wants now."