GracieFighter.com is reporting that Nick Diaz's return from a suspension for drug use is set for the September 15th EliteXC show in Honolulu, Hawaii. This will be the promotion's second taping for Showtime and Diaz is set to fight "Iron" Mike Aina. After his win over Takanori Gomi in February, Diaz tested positive for marijuana use and was sidelined for half a year, with a $3,000 fine added.