Analysis: One hot summer looms around the NBA

NBA free agency opens at 10:01 p.m. MDT Saturday. Here’s a look at the most important story lines to follow.Summer of LeBronEven at 33, James remains the dominant force in the game, and his free agency will again be the league’s No. 1 topic of conversation. The difference this time around is that his options aren’t great. After opting out of the final year of his deal Friday, he’ll likely either stay with the Cleveland Cavaliers or join the Los Angeles Lakers. As constitu