It’s entirely possible the fireworks are just getting started. LeBron James has agreed to a four-year, 4 million contract with the Lakers, shaking the NBA to its core. But what else does Los Angeles have up its sleeve this offseason? The Lakers already have begun filling out their roster since landing James, reportedly agreeing to free agent deals with*guards Kentavious Caldwell-Pope and Lance Stephenson and center JaVale McGee. It’s fair to wonder whether L.A. can pull off another major move or two, though, especially since the Golden State Warriors still are the favorites to win the Western Conference and the NBA Finals. Stephen A. Smith called in to ESPN’s “SportsCenter” on Sunday after