What we can say with confidence is that Stellar arrives with serious support behind the scenes. Roger Varian's yard in Newmarket is one of the most productive operations in the country right now — 87 winners already this season is a remarkable output, and it speaks to a team that knows how to have a horse ready when it matters. Newmarket itself is effectively the headquarters of British flat racing, and horses trained there tend to be prepared to a very high standard. When Varian sends out a well-bred three-year-old for the first time, it is worth paying attention.
Beyond that, the honest answer is that nobody truly knows what Stellar is capable of until the race is run. Debut horses are the ultimate unknown quantity — brilliant in the morning on the gallops, unproven under the pressure of a real race. The breeding suggests potential, the trainer suggests professionalism, and the rest is down to the horse.