"The owners were hoping to aim for the Melbourne Cup. He's been very consistent and his was a great run in the Caulfield Cup last year.
"I guess, without speaking to Chris, the Australian Cup will probably be the ideal type of race for him."
The Group 1 Australian Cup (2000m) will be run at Flemington on March 28.
Melham said Birdman probably should have won first-up and took a lot of confidence out of that run into Saturday's outing.
"I feel that he will go to a new level this preparation," Melham said.
"I love the feeling when he let down today.
"He's a master, Chris Waller. This horse has really come into his own this preparation and he's a gentleman to deal with and he's got a motor to boot.
"That will hold him in good stead moving forward."