If Jarome Iginla snubbing the Boston Bruins, Matt Cooke's hit on Marc Savard and Jaromir Jagr returning to Pittsburgh don't provide enough drama, a Stanley Cup berth is now on the line between the Penguins and Bruins.
All of the storylines aside, a matchup consisting of two contrasting playing styles naturally delivers pivot points on which the series can be won or lost. Expect a lot of line-wrangling and extra changes as Claude Julien and Dan Bylsma manufacture ideal matchups.
In the Western Conference, the defending Stanley Cup champion Los Angeles Kings take on the Chicago Blackhawks. The Kings are armed with the hottest goalie in the playoffs, Jonathan Quick, who was also last year's Conn Smythe winner.
The Blackhawks, undoubtedly the best team in the NHL during the regular season, haven't clicked in the playoffs as many expected. Much of that can be pinned on the struggles of Jonathan Toews and Patrick Kane, who combined for just three goals in the first two rounds.
So, what will be the difference in each series? Check out the latest video from Bleacher Report to discover the X-factors that will decide each matchup.
And while you're at it, leave a comment below with your X-factors!