I don't think, Juventus dominance has ended because their coach is fully prepared to revive the team again so that they can increase their performance in this season. Since Juventus has finally gotten a talented strikers and midfielders ,it showed that they will be able to stand against Milan and other strong teams in this Italian league competition. I think, it will be difficult for inter and Milan to perform very well in next season because other teams managements has used a huge amount of money to sign in talented players that will help them to achieve next season title.
Are you referring to Pogba for the talented midfielder? He is likely to miss half of the new season due to injury. Of course Allegri know what to do, there are also some other players in Pogba's position. However the dominance of Juventus had already ended last season, they did not dominate at all. For the new season, it is even still questionable if they can compete with Milan or Inter.