It will be at least two more seasons (barring a team making a huge move) before a team like the Celtics or Bucks will be able to beat the Cavs. And that is a best case scenario at that. Cause even if Bron falls off to a 18-20 ppg scorer he will still be out there getting 10 assists and 10 boards a night. Plus Kyrie will be there to do the heavy lifting.