And Corbisiero acknowledges it won't be a two-horse race, with the likes of Bath and Harlequins eyeing the top prize once again.
"You've got a number of teams (who can challenge) and you could probably read out four or five," he said.
"Saracens are going to have a lot to prove after losing in that final.
"Bath are on an upward curve and although they finished just outside the top four last season, they're really showing good potential.
"There are so many teams who are competitive and that's what makes it so exciting to watch."