Peter and Paul Snowden have Group One ambitions for I Am Superman this spring, although the first of them has gone by the wayside.

The Snowdens had hoped to run the import in the Sir Rupert Clarke Stakes at Caulfield last Saturday but he was made an emergency and didn't gain a start.

They upped stumps and sent the sprinter-miler back to Sydney, via a mandatory two-day period quarantining at a farm, and he will line up in the Group Two Shannon Stakes (1500m) at Rosehill on Saturday.

"We missed out on getting a run in the Rupert Clarke so we brought him home," Peter Snowden said.

"He just needed a run. It was three weeks from when he won that handicap (at Caulfield) to the Rupert Clarke and he missed out there, so he'll be a month without a run. That's why he's up here Saturday."

After beginning his career in Ireland, I Am Superman came to Sydney for last year's Golden Eagle and finished down the track.

He was transferred to the Snowdens and showed promise at his stable debut when fourth in the Liverpool City Cup on firm ground before striking successive wet tracks.

Back on dry ground first up at Caulfield, I Am Superman posted his first win for the stable and he is a $3.80 favourite to repeat the dose at Rosehill.

With Dalmacia in 1982 the last horse to win the Shannon Stakes-Epsom Handicap double, Snowden says I Am Superman is unlikely to back up in the Group One Randwick mile.

"I'd be more inclined to look at a Toorak afterwards, and the mile of the old Emirates in Melbourne," Snowden said.

"I wouldn't rule it out but it's not on the radar at the moment for him to run in the Epsom."

Saturday's Golden Rose meeting will be Snowden's final one in Sydney before he heads to Melbourne where he will spend two weeks in quarantine.

He will remain in the southern capital to oversee the stable's spring carnival team which includes Golden Rose contender King's Legacy, who is being aimed at the Caulfield Guineas, and Cups hopeful Carif.