Saddler's Rock, Askar Tau and Colour Vision, the first three home in last year's Goodwood Cup, are among 18 possibles for the two-mile Group Two on Thursday.
The John Oxx-trained Saddler's Rock has failed to get his head in front since then and was only eighth to Estimate in the Gold Cup at Royal Ascot on his latest start.
Aidan O'Brien's Ernest Hemingway is a second Irish entry.
Colour Vision, last year's Gold Cup hero, is one of four Godolphin possibles along with Ahzeemah, Cavalryman and Lost In The Moment.
There is continental interest in the shape of the Andreas Wohler-trained Altano from Germany and Gloomy Sunday, who won the Henry II Stakes at Sandown at the end of May, from Christophe Ferland's French yard.
Others in the mix include Brown Panther, Caucus, Glen's Diamond and Mount Athos.