But one thing is certain ahead of the unbeaten pacer's resumption: he is no ordinary horse.
U May Cullect will give four of his fellow New Zealand Cup nominees a head start when he begins from the 50m back mark in race 7, a 2400m handicap.
It is clear the start of the event will be crucial for the Kirstin Barclay and Paul "Tank" Ellis-trained 6yr-old.
"The handicap over a mile and a-half will be pretty tough," Barclay said.
"As long as he steps away, that is the main concern.
"We are just trying to make sure that when he lines up on even terms with a field, he will step away nicely."
Barclay plans to drive U May Cullect for one run after she asks him to step away from the 50m mark.
Part of that tactic is help the horse gain more race experience and tractability among horses before the New Zealand Cup.
In his last start at Addington, U May Cullect's greenness meant he hesitated when asked to take the passing lane and it could have cost him the race.
"As you saw at Addington, he was quite unsure about taking the passing lane and going inside a horse," Barclay said.
"So, Tank and I have been talking about it and we want to drive him with a sit to take those inside runs.
"He is pretty green. He has had only had seven starts and he has either led or come around them. It is all about education, really, and getting him more tractable in the field."
U May Cullect has not made a public appearance at the trials or workouts ahead of his return to racing.
However, he has done enough work in training to be highly competitive tomorrow.
"He wintered up really well; he had three weeks off and he put on a stack of condition," Barclay said.
"We are really happy with him, and he has been working well."
New Zealand Cup nominees Franco Santino (20m), Robyns Playboy (20m), Sagwitch (30m) and Airpark Flyer (40m) each get a head start on U May Cullect.
Franco Santino, who beat an inferior field in Gore in his last start, is the only one of the five cup contenders to go in on Sunday with the benefit of recent racing.
Airpark Flyer has had one trial and workout before his resumption.
In the first of those, the Trent Yesberg-trained pacer finished just a neck behind Maurice Holmes Vase winner Classie Brigade.
Robyns Playboy goes into the race after running second in a sedate Gore workout.
Sagwitch has not stepped out at the trials or workouts ahead of his resumption.
The feature trot at the Winton meeting, which will also be run over 2400m and under handicap conditions, features the return of talented squaregaiter Picketts Ridge.
The 6yr-old, who has had two workouts ahead of his return, will start from 30m in his first start since November last year.
Picketts Ridge clashes with Davey Mac (front), Rydgemont Son (10m), Imran Khan (20m) and Wee Man Trouble (40m).
