Douvan could face up to seven rivals in the Paddy Power Cashcard Chase at Leopardstown next Tuesday.
The six-year-old has won each of his 11 starts since joining Willie Mullins and made a fine return to action when landing the Hilly Way Chase at Cork earlier this month.
The champion trainer has also left in Tingle Creek hero Un De Sceaux, as well as Black Hercules.
Sizing John is set to make his first appearance since joining Jessica Harrington. He has been placed behind Douvan on six occasions, including at the last two Cheltenham Festivals.
Sizing John's former trainer Henry de Bromhead could saddle Alisier D'Irlande, while Mouse Morris has a couple of contenders in Mozoltov and Smashing.
The only British contender, the Nicky Richards-trained Simply Ned, completes the acceptors.
