The proven mudlark won five times during an outstanding 2012 campaign, enjoying his finest hour when winning the British Champions Sprint at Ascot in October.
He made a winning return at Naas in mid-April and was far from disgraced when fifth in the Duke of York Stakes on his most recent outing.
With conditions at Ascot looking likely to be on the quick side, Nagle has decided to declare Maarek for Sunday’s Listed contest, but he is not ruling out the prospect of doing the double should the rains arrive in Berkshire.
“He’s in good form. It looks like Ascot is not going to come up soft enough for us so we decided to run here,” said Nagle.
“We’ll play it by ear as regards the Diamond Jubilee. There is some rain forecast, but it’s not enough. We are hoping for a bit more, and if it comes he’ll go there.
“Last year he ran in a Listed race at the Curragh and five days later he won the Group Two at Ascot on Champions Day.
“They are calling it yielding in Cork at the moment and that would do us, but obviously any more rain won’t do him any harm.
“You’d imagine he’s the class horse in the race on Sunday, and we couldn’t be happier with him. He’s come out of his last run at York perfect.”
Nagle admits the rest of Maarek’s campaign will be dictated by underfoot conditions.
The trainer said: “On Irish Derby weekend there are a number of races for him. There is a Group Three (Sapphire Stakes) at the Curragh, the Chipchase Stakes at Newcastle, which he won last year, and a race in France.
“He’s entered everywhere and whichever comes up with a nice cut in the ground will decide where we go.”
Maarek concedes weight to six opponents on Sunday, including Tommy Stack’s course winner Cape Of Approval.
Stack’s son and assistant, Fozzy, said: “The more rain he gets the better but obviously that will suit Maarek as well and I’d imagine he (Maarek) will be very hard to beat on that ground.
“I’d prefer to be going six furlongs with him rather than five but hopefully the ground might slow them down and he might run into the money.”
Kevin Prendergast is hoping Roseraie can pick up some valuable black type.
He said: “She’s in good form. She ran in Naas last time and ran well considering she was badly drawn.
“Hopefully she will run well as outside of Maarek they all look similar enough. She wasn’t that far off Maarek over five furlongs at Naas earlier in the year.”
The field is completed by Red Dubawi, My Girl Anna, Nini OK and Zoola.