Saphir Du Rheu, Zarkandar and Annie Power all remain in contention for the Ladbrokes World Hurdle at Cheltenham next week.
Saphir Du Rheu and Zarkandar form a formidable twin assault for champion trainer Paul Nicholls, who won the race four times with the legendary Big Buck's.
Annie Power, runner-up behind More Of That 12 months ago, is also among the 22 confirmations, but is expected to instead take on her own sex in Tuesday's OLBG Mares' Hurdle.
Her trainer Willie Mullins is still likely to be represented after also leaving in Abbyssial, Briar Hill, Pont Alexandre, Un Atout and Zaidpour.
Noel Meade's Monksland, the Tony Martin-trained Dedigout, Jessica Harrington's Jetson and Lieutenant Colonel from Sandra Hughes' yard are other contenders from Ireland.
Former Champion Hurdler Rock On Ruby and last year's Coral Cup victor Whisper are also on the list.
