NBA 2018-19: 3 Reasons why the Golden State Warriors' dominance could be coming to an end

#1 Expiring contracts

Kevin Durant will likely leave the Warriors this year

While new rivals are emerging in the NBA, and the Warriors' roster is getting older, the team's main obstacle to further success is their current contract situation.

A team of DeMarcus Cousins, Kevin Durant, Draymond Green, Klay Thompson and Steph Curry is virtually unbeatable, but the team could lose two or three of those players in the 2019 postseason.

DeMarcus Cousins has been told by the franchise that he is only in California for a year, so it would take a big change in circumstances for the 28-year-old to stay. Meanwhile, Kevin Durant is looking to lead his own team for the first time in his career, and the Warriors' offer of a max-contract is unlikely to be enough to make him stay this summer.

There is also the curveball of Draymond Green, who is out of a contract in 2020. The 3-time All-Star has already stated that he won't settle for anything other than a max deal, and the Warriors won't be willing to pay both millions in salary and luxury tax to keep a 30-year-old Green.

This means that the Warriors face the very real possibility of trading him in the next 18 months, and ultimately, only Thompson and Curry look guaranteed to be on their roster next season.