Heroic Valour's performance at Ellerslie this weekend will determine the future direction of his three-year-old career.
The group one-winning colt has improved with his first-up run and he will strip a fitter horse for Sunday's Karaka 3YO Mile.
"He worked extremely well this [yesterday] morning and we're pretty confident he will run very well," Te Akau principal David Ellis said.
"We'll decide after Sunday whether he presses on to the Derby or if we keep him to the shorter races, possibly in Melbourne."
The Stephen Autridge and Jamie Richards-trained Heroic Valour has been nominated for the group one Australian Guineas over a mile at Flemington on March 4.