Nicky Henderson is considering giving Finian's Rainbow and Simonsig surprise appearances at Killarney's forthcoming three-day meeting.
Finian's Rainbow could go for the Leane's Tool Hire & Lawnmowers Chase over an extended two and a half miles on Sunday, while Simonsig is to be given an entry in a two-and-a-half-mile hurdle on Monday.
The former Cheltenham Festival winners have been on the sidelines for some time.
Simonsig was last seen winning the Arkle Trophy in March 2013 but a splint injury caused the talented grey to miss the 2013-14 season.
Several setbacks since then thwarted Henderson's plans to bring him back during the last campaign.
Finian's Rainbow, who lifted the Queen Mother Champion Chase in 2012, has been absent since he struck into himself in the Paddy Power Gold Cup in November 2013.
"Conditions of that race at Killarney do augur well for Finian's, and Simonsig is also going to be entered there on Monday," said the Seven Barrows trainer.
"I won't say Simonsig will definitely run but he's going to be entered in a conditions race over hurdles.
"It is just possible one or the two could go. It will depend on the ground." Connections of easy Prix Greffulhe winner Sumbal have not completely ruled out supplementing the unbeaten colt for the Ivestec Derby after his stroll to victory at Saint-Cloud.
If the ground was to come up soft in the days leading up to the Epsom Classic then the Francis Graffard-trained three-year-old could still be involved on the Downs.