Rocky Creek will head for the Lexus Chase at Leopardstown on 28 December after his fine effort in defeat at Newbury on Saturday
The Paul Nicholls-trained seven-year-old had always been talked of in terms of a Hennessy Gold Cup contender and a long-term plan nearly came to fruition when he was second to Triolo D'Alene.
Victory would have capped a dream day for part-owner Andy Stewart, who saw his own colours carried to victory by Celestial Halo and Tatenen on the same card.
"You don't get days like that very often," said Stewart.
"We can't go for the Welsh National now off 155 so we'll go for the Lexus instead.
"That will tell us where we stand with him, I think, and it should be a good race for him.
"I don't think the ground really matters to him. I know Ruby Walsh used to say he'd prefer a bog but it was perfect jumping ground on Saturday and he seemed to go all right on it.
"I think sometimes too much is made of ground conditions."