From 1970-1980
You had 8 different champions with the celtics and lakers the only one to win it twice.
1980-2010
You have had 8 different champions but if you throw out the heat and 76ers who only one it once that leaves just 6 teams. The lakers,celtics,bulls,pistons,spurs and rockets.
So before next season if you want to make a futures bet just bet one of those 6 and you cannot go wrong. What a joke the nba is