Lebron James is either staying in Miami or going back to Cleveland. Nothing else.
I actually think he doesn't opt out and finishes out his contract in Miami and returns back to Cleveland in the summer of 2016 to finish out his career on something far less than the maximum (to help smooth things over and restore his image a bit). If he opts in, that gives him about 45 million over the last two seasons and gives Miami a couple of more chances to get another title. I also can't see him leaving Miami in 2014 unless they have a total train wreck of a season. I mean if they win a title again, I can't see how he can leave the 3 time defending champion.