The NBA offseason has brought many changes to rosters, coaching staffs, and the list of championship contenders. As we draw closer to opening night, it's time to move our focus from the potential impact of each offseason event and onto the broader issues that figure to define this season. The BDL 25 takes stock of, uh, 25 key storylines to get you up to speed on where the most fascinating teams, players, and people stand on the brink of 2015-16. When Paul Pierce was dealt to the Brooklyn Nets in the summer of 2013, the immediate reaction by most (after, of course, marveling at the Nets' absurd payroll) was that the lifetime Celtic was going to look awfully weird in his new uniform. Pierce had been the subject of trade rumors at times during the low point of his Celtics career some years earlier, but nothing was ever consummated, and now after 15 years he was going to be wearing different colors. Pierce made it work, though, even if the Nets could not. Following one season with that team he jumped to the Washington Wizards – again, "that'll look weird" – but Pierce again looked resplendent in his Wizards uni. [ Follow Dunks Don't Lie on Tumblr: The best slams from all...