One of baseball's oldest and greatest rivalries will take center stage in MLB's standalone Sunday night opener on April 5. And no, we're not talking about Yankees/Red Sox or Dodgers/Giants for a change. The back-to-back NL Central champion St. Louis Cardinals are scheduled to travel north to take on the Chicago Cubs in what will be a historic night at Wrigley Field. For the first time in the ballpark's 100-year history, the Cubs will play their home opener at night . For a standalone opener, that historical note may not seem like enough to justify this game choice. In the past, this ESPN exclusive broadcast usually features the defending World Series champions like the San Francisco Giants, or the league's buzziest team, like the Los Angeles Dodgers last season. Well, don't look now, but the Cubs are quickly moving into the latter territory with Joe Maddon on board and a roster rebuild that will likely be accelerated this winter. Throw in the Cardinals, the one rival Chicago is always chasing but rarely catches, and you have an interesting baseball storyline in place for opening night. But it's far from the only interesting storyline. The Sunday opener will be a national showcase...