There will also be interest in the return from hip surgery of Kiwi Tineke Stewart, who had fifth placings in Ironman 70.3 races in Cairns and Geelong.
The men's race is set to be a battle between transtasman rivals Tim van Berkel and Terenzo Bozzone.
Van Berkel, who was fourth at Ironman New Zealand last year, has enjoyed another outstanding 2015 season. He won Ironman 70.3 Sunshine Coast and was runner-up in a sprint finish with Tim Reed at Cebu in the Philippines. He was also runner-up at Ironman Asia-Pacific Championship in Melbourne.
Bozzone started the year strongly as runner-up in Taupo at Ironman New Zealand and has enjoyed six Ironman 70.3 podiums including a win in Budapest. After the disappointment at the Ironman 70.3 World Championship, Bozzone is working his way back into form, most recently notching up a third place at Ironman 70.3 Mandurah.
There will be considerable interest in the appearance of Wanaka's Dougal Allan, who has won plaudits in the multisport scene in New Zealand, before turning his attention to Ironman with an outstanding runner-up effort in Sweden on debut. Add to that fellow multisport star Braden Currie, a two-time Coast to Coast champion and runner up in this month's Xterra Worlds, who has his sights on potential qualification for triathlon at the Rio Olympics.
Some in-form Kiwis will be pushing for the podium including Dylan McNeice, who was third at Ironman New Zealand and Cairns; Mark Bowstead who won the Taupo Half last year and enjoyed a breakthrough Ironman 70.3 victory at Buffalo Springs this year; Callum Millward who was runner-up at Ironman Coeur d'Alene and Simon Cochrane who was third at Ironman Japan after finishing fifth at Cairns, sixth in Western Australia and seventh in New Zealand.
Add to that the likes of veteran Bryan Rhodes, exciting newcomer Matt Franklin, the well-performed Carl Read, German Michael Wetzel and former Olympic cyclist Matt Randall.
The race, which offers 75 spots for next year's Ironman 70.3 World Championship at Mooloolaba, has more than 1200 entries from 34 countries.