However, defending champions Amanda Pottinger and Just Kidding seem to be back on form, having overcome the loss of confidence suffered by the horse as a result of the serious ducking they had in the water complex en route to winning the title last year.
The Oceania Young Rider Championship will also take place at Melbourne, at CCI2* level, with a team of future internationals named to take on their peers across the ditch.
Both the current young rider champion and leader of the Mitavite Young Rider series, Abigail Long on Enzo, and last year's champion and series winner, Jackson Bovill on Visionnaire, have been named, together with Vicky Brown-Cole on Eli and Renee Faulkner on Rubinstar HH.
Faulkner and Bovill have both stepped up to 3* during the competition year, and Faulkner has elected to start in the short format CIC3* at Taupo, while the other three are starting at 1* level for a confidence boosting last run before flying out with the Senior squad horses. Long's huge margin at the top of the Mitavite Young Rider series will ensure she is not overtaken.
Surprisingly, the new leader of the Equestrian Entries Pro-Am series, Taupo's Holly Morrell on Pampero, is also competing at 1* level, giving the long-time leader Madison Crowe on Waitangi Pinterest the opportunity to retake top spot with a good performance in the Bates Saddles CCI2*.
The winners and place-getters in all six series will receive their rewards at the ESNZ Eventing annual awards dinner in Auckland on July 1.