The Oklahoma City Thunder's upcoming second-round series against the Los Angeles Lakers is full of storylines, but a battle between a championship-proven, but still young, Thunder team against a Lakers squad scattered with long-tenured veterans and unproven youngsters is the biggest highlight. The most proven veteran in the league will be facing Oklahoma City in a playoff series for the first time in over a decade, when LeBron James's Miami Heat took down the original OK-3 of Russell Westbrook, James Harden and Kevin Durant. Every competitor in that series is no longer with their respective organization. Harden, James, Durant and lastly Westbrook all went their own ways; legends such as Chris Bosh, Dwyane Wade and Serge Ibaka hung up the sneakers. But, James in his 23rd season now faces the organization he won his first championship against all those years ago. OKC is heavily favored in the series, as the reigning champions have only improved since taking home the city's first trophy.…