It will be the first time Willis returns to the regional sports park since opening the all-weather track in October 2008.
"We are also getting great support from Sir Graeme Avery of Sileni Estates. Sir Graeme has vast experience in putting together major international athletic meetings and Sileni is our major sponsor again this year," says Potts.
The classic is in its 17th year. The event is named after the late Allan and Sylvia Potts.
Sylvia was a New Zealand champion 800m runner who competed at the Olympic and Commonwealth Games, narrowly missing the Commonwealth gold medal in 1970 when she fell just short of the finish line.
Husband Allan was a New Zealand track coach and son Richard also is a former Commonwealth Games representative.
Willis and his brother Steve, a former athlete who coaches now, are the only brothers in New Zealand's history to have both broken four minutes for the mile.
Nick Willis married Sierra Boucher on September 30, 2007.
In 2012, they became parents to son Lachlan.
They live in Ann Arbor, Michigan.