A race that has thrown up Derby winners Galileo and High Chaparral, O’Brien has five other possible runners, with Astrology, Athens, Frontier, Imperial Monarch and Tower Rock engaged.
Jim Bolger, successful 12 months ago with the filly Banimpire, is also strongly represented by Light Heavy, While You Wait and the unraced Night Invader, a son of Teofilo.
John Oxx has entered Call To Battle, winner of a Leopardstown Listed race on his final start at two, Dermot Weld can call on Hit The Jackpot while Paul Deegan’s unbeaten China One completes the field.
Jim Bolger’s Dewhurst Stakes winner Parish Hall could make his seasonal debut on Sunday in the Leopardstown 2,000 Guineas Trial Stakes as 10 entries were revealed.
A son of Bolger’s brilliant Teofilo, who also won the Dewhurst but never made it to the track at three, Parish Hall extended his trainer’s already excellent record in the Newmarket Group One.
Bolger has also entered Aquilonius together with two other sons of Teofilo in Tiger At Heart and Heavy Weight.
Aidan O’Brien’s strongest contender may be Nephrite, who maintained his unbeaten record when beating Born To Sea, a half-brother of Sea The Stars.
Other Ballydoyle entries include Beresford Stakes winner David Livingston, Middle Park victor Crusade, Furner’s Green and Vault.
John Oxx suffered a blow earlier this week when forced to rule Akeed Mofeed out of the Guineas but stable companion Akeed Wafi could emerge as a Classic contender.
Cheveley Park Stakes winner Lightening Pearl will have her Classic credentials tested if she runs in the Leopardstown 1,000 Guineas Trial Stakes after appearing among 17 entries.
The Ger Lyons-trained filly provided the trainer with his first Group One triumph last autumn and runs in the colours of Pearl Bloodstock, who sponsor the 1000 Guineas at Newmarket under the Qipco banner.
Not surprisingly, Aidan O’Brien has plenty of entries, the most eyecatching of which is the impressive Rockfel Stakes winner Wading. After, Homecoming Queen, Ishvana, Soon, and Up could also represent Ballydoyle.
John Oxx has entered Rubina, Kevin Prendergast can chose from Bulbul and Redoubtable, while David Wachman’s Fire Lily is another possible.
Ralph Beckett’s Electrelane, fourth in a Listed race in France when last seen, is the sole British entry.