One week from today, LeBron James can opt out of his contract and become an unrestricted free agent. Three weeks from now, he can sign with the Los Angeles Lakers or Houston Rockets or Cleveland Cavaliers or … fill in the blank. And Dwyane Wade and Chris Bosh are in similar situations, as all have early termination options in their contracts. But despite this uncertainty, in NBA futures betting the Heat are listed as 3-1 favorites to win the championship in