Richard Fahey's star miler was a strong-finishing third to The Gurkha 12 months ago but has been in a league of his own this season, winning the Lockinge and the Queen Anne Stakes.
He is likely to have the services of pacemaker Toscanini, while his owners Godolphin also have Saeed bin Suroor's Dream Castle and Barney Roy.
The latter, trained by Richard Hannon, was just touched off by Ulysses in the Coral-Eclipse at Sandown over 10 furlongs but had previously won the St James's Palace Stakes over this distance at Royal Ascot.
Before that, Barney Roy had only been beaten a length by Churchill in the 2000 Guineas but had him back in fourth at the Royal meeting.
Churchill is one of six possible runners from the Aidan O'Brien stable along with Cougar Mountain, Lancaster Bomber, Spirit Of Valor, Whitecliffsofdover and redoubtable filly Roly Poly.
The others in the mix are Here Comes When, Kool Kompany, Lightning Spear, French challenger Zelzal and Zonderland.