It’s not the current NBA Champions.
According to ESPN reports the top 4 teams have been named that are favorited to win next years title.
ESPN reported, according to Las Vegas:
…the Westgate SuperBook has the Golden State as the favorite, at 7-4, to win the 2017 NBA Championship. The Cavs are next at 5-2, followed by the San Antonio Spurs at 6-1 and Oklahoma City Thunder at 8-1.
It also depends on the upcoming offseason.