MIAMI — LeBron James has this summer on his mind, and is already starting to plan for next season. The summer of 2014, that can wait. James said Tuesday that he is not thinking about the possibility of becoming a free agent in 12 months, though he did acknowledge that the prospects of competing with Dwyane Wade, Chris Bosh, Erik Spoelstra and Pat Riley for several more championships with the Miami Heat is more than a tiny bit intriguing.