Michael Bell's Big Orange made just about all the running in the Gold Cup in June, but was subsequently beaten at Goodwood, when trying to give weight to fellow Royal Ascot winner Stradivarius.
As he did 12 months ago, Aidan O'Brien's Order Of St George won the trial for this race last time out, but he was beaten at 1-7 in the main event by Wicklow Brave, who is in line to defend his title for Willie Mullins.
There are 22 left in, including Sir Michael Stoute's Dartmouth, William Haggas' Dal Harraild and the Ebor runner-up Flymetothestars for Sir Mark Prescott.
John Gosden's Western Hymn, Jessica Harrington's Torcedor, Hughie Morrison's Nearly Caught and Joseph O'Brien's Rekindling are others in the mix.
As well as the favourite, O'Brien senior could also run the likes of Johannes Vermeer, US Army Ranger and Venice Beach.
Flymetothestars has several options, but were any more rain to fall that would certainly be in his favour.
Tim Palin, racing manager of owners Middleham Park Racing, said: "He's got the Irish Leger, the German Leger, the September Stakes, which might be a bit sharp over a mile and a half, and the Prix Gladiateur as his options.
"He'll run in one of those and we'll take it on a ball-by-ball basis and we'll try and find the best fit taking into account ground and opposition.
"We were considering the Mallard at Doncaster, but we just feel now that the handicapper has had a few goes at catching us it might be time to raise our sights a bit."