Lebron James is the #6 on the all time NBA scoring list and sits just 217 points behind Wilt Chamberlain, for #5. He's also only 1090 points behind Jordan so, in all liklihood, James will finish the season 4th all time in scoring.
He's 2441 points behind Kobe at #3 so I would expect Lebron to overtake him next year.
He's 5723 points behind Karl Malone and 7185 behind Kareem. At the pace Lebron is going, Malone seems very gettable. Scoring a modest 1600 points a season (a mark which would be the lowest of Lebron's career) for the next 4 seasons would be 6400 points.
That would make him 37, at the end of that season, which is old. But Malone scored 1667 points at age 39 and he might, strangely, be the best physical comp for Lebron. I also think he's more likely to score in the 1800-1900 range for the next two seasons which would make catching Malone even easier.