Aidan O'Brien expects to field four runners in the Tattersalls Irish 2,000 Guineas at the Curragh on Saturday week.
War Command is set to be joined by Michaelmas, Fountain Of Youth and Great White Eagle in the one-mile Classic while Marvellous and Palace are likely to represent Ballydoyle in the Etihad Airways Irish 1,000 Guineas a day later.
O'Brien said: "That is our likely line-up for both Guineas and they are all in good form and working well."
Magician is also due to contest the Tattersalls Gold Cup at the Guineas fixture while Darwin, who has been off the track since finishing third in a one-mile Group Three last September, is due to step down to six furlongs.
O'Brien added: "Darwin is working well and is on course for the Greenlands Stakes."
Dermot Weld has Alkasser, Free Eagle, Weld Arab and Mustajeeb in the 2000 Guineas but only the latter is due to run at present after beating older horses to land the Amethyst Stakes on his return.
He said: "The plan is to run Mustajeeb but we will make a final decision early next week."
Weld also has seven entries in the 1,000 Guineas, including Afternoon Sunlight, Balansiya, Tested and Vote Often.
He said: "I not sure which of them will run at the moment, but as is the case with the 2,000 Guineas, we will make a decision early next week."
Jim Bolger has four entries for the 1,000 Guineas in Heart Focus, Ceisteach, Peony Fairy and Plamas, with the first-named likely to take her chance in what would be her first run since last July.
"Heart Focus will be our representative in the race," said Bolger, who has last year's Irish Derby hero Trading Leather in the Tattersalls Gold Cup frame.
Paul Deegan's Prince Of All is on course for the 2,000 Guineas, with Avenue Gabriel lined up to contest the fillies' Classic.
"That is the plan but he needs good ground to be seen at his best so hopefully the weather will pick up," Deegan said.
"Avenue Gabriel will definitely contest the 1,000 Guineas. She has come on a good deal for her last run and I could not be happier with her."