This Celtics team is going to be very special next season. With Kyrie Irving and Gordon Hayward returning to a unit that took LeBron James and the Cleveland Cavaliers to seven games, it seems as if the sky is the limit. Also, Jaylen Brown and Jayson Tatum are expected to improve and become even better all around players, as they are only 21 and 20 years old. Boston has the talent and coaching to be arguably the best team in basketball, but there are a few obstacles in the way.