1. if they can stay healthy they are cursed with the injury bug
2. free agency - all those players will be up before 6 years. will they want to stay?
3. salary cap - if all those players perform and want to stay can they give them all max contracts?
4. The Cavs will still be the team to beat in the next 2-3 years, with Boston and Minnesota improving dramatically.
5. Golden State - They are built to be a Dynasty. All their core players are young. As good as the potential of the 76ers. Golden State has already proven it. Durant, Curry, Green make a fearsome group. I would add Klay Thomspon but I think they will trade him for assets as they will not be able to pay him the max.

But ya never know. That is why they play the games! Good luck!