The 37-year-old, without a club after leaving Villarreal at the end of last season, has recently been training with Arsenal to maintain his fitness.
Wenger holds Pires in high esteem after bringing him to Arsenal from Marseille in 2000 and twice winning the Premier League title with the playmaker.
"To me, before his knee injury, Pires was the best left attacking midfielder in the world," Wenger told L'Equipe.
"With us he was just flying. Even if he has lost the speed of his youth, he can still help at Aston Villa thanks to his knowledge of the game."
Source: Team Talk