Jockey Richard Hughes was keen for the colt to try a mile and a quarter for the first time, and it was up to trainer Hannon and owner Sheikh Joaan Bin Hamad Al Thani to be in agreement too.
Toronado will be having a break from his sparring partner Dawn Approach, who beat him in both the 2000 Guineas and St James's Palace Stakes at Ascot, but the score moved to two-one after a confident ride from Hughes in the Sussex Stakes at Glorious Goodwood.
An update on www.richardhannonracing.co.uk said: "It's all systems go for Toronado who will be declared for Wednesday's International at York this morning. The plan is to run as long as there is not heavy rain."
Al Kazeem heads the five rivals facing Toronado for the Group 1 prize after the final declarations were published. Roger Charlton's five-year-old has risen right to the top of the European pecking order this season after his victories in the Tattersalls Gold Cup, Prince of Wales's Stakes and Coral-Eclipse.
Aside from Toronado, there are two other three-year-olds in the line-up in Irish Derby winner Trading Leather and Royal Ascot scorer Hillstar.
The pair have already met, with Trading Leather three-quarters of a length ahead when they were a respective second and third in the King George VI And Queen Elizabeth Stakes. Declaration Of War, who has been kept busy and was most recently fourth in the Prix Jacques Le Marois, is Aidan O'Brien's only representative while James Toller's Rewarded completes the sextet.
Meanwhile, Afsare could attempt to build on his recent Salisbury success in Saturday's Betfair Celebration Mile at Goodwood.
Luca Cumani's gelding, second in last year's Arlington Million, has had well-documented issues with the stalls but showed his undoubted ability when coasting clear in last week's Group 3 Sovereign Stakes.
Trade Storm, not disgraced in the Queen Anne and Sussex Stakes this season, is entered for a slight drop down in class, while among the 14 remaining at the confirmation stage are an interesting trio from Aidan O'Brien's Irish stable.
He can pick from Jersey Stakes winner Gale Force Ten, Cristoforo Colombo - who has not been seen since finishing fifth in the 2000 Guineas - and Most Improved, the hero of last year's St James's Palace Stakes who did not make much of an impression on his Ballydoyle debut at the Curragh.
Premio Loco, who beat possible rival Thistle Bird in this race last year and had a confidence-boosting victory at Newmarket, is in the line-up once again while Chil The Kite and French raider Shamalgan have decent Group form too.
Aesop's Fables, Boom And Bust, Educate, Gabrial and Stipulate complete the list of possible starters.
O'Brien, meanwhile, outlined his intention for Saturday's Irish Thoroughbred Marketing Gimcrack Stakes at York. "The plan is to run Wilshire Boulevard," said O'Brien. "He seems in good form."
Ballydoyle only confirmed one juvenile in the 11-strong field in the shape of the Holy Roman Emperor colt, who needed three goes to get off the mark but took the Group 3 Anglesey Stakes at the Curragh last time. Astaire will be Kevin Ryan's representative as he attempts to retain the Group 2 prize he took with Blaine 12 months ago. Astaire won on his debut at the Knavesmire and, after a sixth in the July Stakes, he landed a conditions event at Newmarket last time.
Cable Bay and Thunder Strike have another shot at the William Haggas-trained Saayerr after their respective second and third to him in the Richmond Stakes at Glorious Goodwood.
Ryan also has Sleeper King engaged while Richard Fahey will be hoping Parbold can improve on his placings in the Coventry and Vintage Stakes and also fields Salford Red Devil. David Brown's My Catch has won twice in France recently with Bahamian Heights and Justice Day completing the line-up.
At Yarmouth today, Trulee Scrumptious has the potential to go well in the arenaracingcompany.co.uk Apprentice Training Series Handicap.
Peter Charalambous' filly has not yet won in 13 starts but she served notice at Newmarket last month her time could be near.