The feature mile race of the Sydney autumn carnival has emerged as the target for Saturday's controversial Rosehill winner Scream Machine.

The Jason Coyle-trained Scream Machine will be given his chance next preparation to get to the $2 million Group One Doncaster (1600m) in April.

Scream Machine made it back-to-back Rosehill wins when he won a 1900m event at Rosehill on Saturday on protest.

Kathy O'Hara successfully objected against Marden's jockey Peter Robl for taking her running early in the race but O'Hara also had help from stewards who fired in their own objection for an incident at the top of the home straight.

Coyle believes Scream Machine will continue to improve and return a better horse next preparation, opening up the prospect of the Doncaster.

"We'll definitely throw in a nomination for the Doncaster and we'll see where he sits when he comes back," Coyle said.

"The whole time along I've always said 'next preparation', and we've been patient with the horse.

"Hopefully I get it right and when he comes back as a later four-year-old in the autumn carnival he will find that extra couple of lengths that he probably needs."

Coyle said it wasn't the easiest way to win a race at Rosehill but was just happy to see Scream Machine take his record to four wins from 16 starts.

"I thought both sets of interference definitely cost the horse any chance of winning the race legitimately so it had to be won in the stewards' room," Coyle said.

Scream Machine's only Group One appearance to date was a ninth in the Queensland Derby in June.

He had had four consecutive placings this preparation before his luck changed with back-to-back wins. For Robl, the race was not only lost but his actions resulted in a suspensions for the two incidents of interference.

The bans will be served concurrently with Robl to head to an early Christmas break after Thursday's Wyong Magic Millions in which he rides the Clarry Conners-trained Assail.