I honestly do not expect Lakers to lose Lebron, he will stay there without a doubt, he won't move until his son is in the league, which will be another season if I am not wrong, if that were to ever happen then I am guessing that the only way he leaves is to go where his son is drafted and have one last season there.
Only he will know if he will stay or not. We don't know what decision he will make in the future as he is very unpredictable. He always wants to win a championship to cement his legacy, but the Lakers fell short last season, so he might consider joining another team to increase his chances of winning a championship. However, this is just my perception, and I could be wrong.
Regarding his son, aside from his father is a popular icon in the NBA, based on his stats, how high is his chance of getting in the NBA?