The Mark Kavanagh-trained colt yesterday opened on the third line of TAB Fixed Odds betting for the Group One Australian Guineas (1600m) at Flemington on March 6.

Only Bart Cummings' Cox Plate winner So You Think and ultra- impressive Golden Rose hero Denman, two of the best three-year-olds we have seen in years, have been rated above We're Gonna Rock in betting for the $750,000 Guineas.

"He looks to be the next superstar and the stable has a huge opinion of the horse," said TAB Fixed Odds representative Matt Jenkins.

"His impressive win on debut was enough to ensure he is well in the market."

The betting giant expects We're Gonna Rock to contest the Guineas, after rating him a $17 chance in the Group One Newmarket Handicap (1200m), also run at Flemington on March 6.

Boom filly Black Caviar, unbeaten in four career starts, heads betting for the $1 million Newmarket at $5.50, slightly ahead of All Silent ($6.50) and comeback galloper Weekend Hussler ($8).

We're Gonna Rock sent shockwaves through the racing industry with a jaw-dropping win over 1000m on debut at Flemington late last year.

In a small field that included the previously unbeaten Marconi, the hulking Fastnet Rock colt dawdled out of the gates before unleashing a devastating finishing burst to win the race with ease.

The effort was amazing to watch but was simply breathtaking once the sectional times revealed he had run his final 600m in 31.82sec - faster than what All Silent produced to win the Group One Patinack Farm Classic only weeks earlier. The only problem Kavanagh faces is whether he keeps We're Gonna Rock against his own age group over a mile in the Guineas or test him against the best sprinters in the country in a style of racing he has already proved to excel at.

If he decides on the three-year-old path, We're Gonna Rock will have to take on the likes of So You Think, Denman, Manhattan Rain and Starspangledbanner - seasoned campaigners who have all competed with success at the top level.

The Newmarket appears unlikely because We're Gonna Rock has only won one race and would need to significantly boost his rating before gaining a start in the nation's premier sprint handicap.

Kavanagh yesterday said he had yet to make up his mind and was in no rush to decide.

"'I am keeping my options open at this stage, that is why I have nominated him for both races," the Melbourne Cup-winning trainer said. "The two of them look attractive options, I'll wait and see how he comes up and let the horse decide."