The clamour began after that win at Rosehill for him to be sent south to take on his illustrious stablemate Winx in the Cox Plate, with many good judges opining that the youngster, with the weight allowances afforded to three-year-olds in the weight-for-age championship, might be the only horse who could threaten her.
Those calls will invariably grow louder now, but Waller, who was reluctant after The Golden Rose, remains equally cool on the idea even after the 4 length margin over the $101 shot Vassilator.
The Autumn Sun began brilliantly and McDonald, summing up the situation quickly allowed him to slide into the leading group although there was some consternation in the stands at the fact that he was three wide throughout the journey.
But covering a bit of extra ground was never going to be a problem and when the rider gave him his head he exploded away to quickly build up the sort of winning margin rarely seen in a group 1 contest.
Waller now has grand plans for the colt, and an overseas trip is clearly on the agenda. But he is not keen to take on Winx in two weeks.
‘‘He’s a very good horse, [but] I don’t think he’s fully mature yet,’’ Waller said.
‘‘I still think he’s going to fill out a lot more, he’s so relaxed, and that’s the way I want to see him when he retires – and he will have a few more group ones to his name.
‘‘I know everyone is dying to hear whether he will run in the Cox Plate. That will ultimately be up to the owners [Hermitage Thoroughbreds and Arrowfield Stud].
‘‘If he’s going to be a world champion he would have to be to beat Winx, but if he’s going to be a world champion in two weeks’ time he will be in six months’ time.
Always emotional about his horses, Waller made it clear what he thought about his latest star.