Ah....like the Rivalry between hockey teams?
Duh.

Hockey teams, football teams, baseball teams, basketball teams....lots of other stuff. Montreal claims to have the best nightlife, which Toronto vehemently disagrees. Vancouver says they are the best destination for those who love winter sports, to which Calgary points out who hosted the Winter Olympics first. Jamaica proudly says they have the best food, to which
everybody else disagrees. It's the way it goes, you see.
I assume Harold Ballard never gets his grimy hands on the Leafs.
I am gonna have Ballard own the Leafs, but I'm gonna have him have health problems in the late 1970s. Having had health issues and knowing that his time was almost up, he decides in 1979-80 to effectively say 'fuck it, I'm never gonna lose money on this, and I want championship banners. This sees Dave Keon and Darryl Sittler finish their career as Leafs, and they trade for the #1 in 1984, sending Rick Vaive and the 4th overall pick for the 1st overall, which dutifully sees Mario Lemieux go to the Leafs. Illness means Lemieux doesn't suit up for the Leafs until 1985, allowing Mario Lemieux and Wendel Clark to lead a suddenly VERY resurgent Leafs team.
A second heart attack in 1986 sees Ballard look to go over the top, and he gets that opportunity when Peter Pocklington is shopping Gretzky. The Great One ends up coming to Toronto, though problems with playing time sees Lemieux traded to Pittsburgh in early 1989 for Mark Recchi, Zarley Zalapski and five draft picks in 1990, 1991 and 1992, which get used to select Martin Brodeur and Mikael Renberg, while Pittsburgh's 1990 first-rounder gets sent to St. Louis in return for Scott Stevens. (Pittsburgh got the pick back in another trade, and selected Jaromir Jagr with it.) Ballard's death also allows his successor, Steve Stavro, to sign up legendary Russian goaltender Vladislav Tretiak, initially as a coach to the incoming Brodeur and Felix Potvin - but Tretiak is so good that he ends up playing in net next to Brodeur and Potvin, both of whom would proudly admit to learning from him. Stevens' arrival gives Borje Salming a real (and really good) partner, and him and Stevens play together until the latter's retirement in 1993, despite Toronto drafting Scott Niedermayer in the 1991 Draft. Armed with a bulletproof defense and a scary front end (namely from usual partners-in-crime Gretzky and Doug Gilmour), the Leafs roar to their first Stanley Cup in 25 years in 1993, allowing Salming and Tretiak to retire as Cup champions. The following year, Wendel Clark is traded to the Nordiques in a move that brings Mats Sundin to town but is at first absolutely hated by Leafs fans.
The Leafs in the 1990s gain a rep as a team with absolutely-impregnable defense - Stevens was joined in the 1990s by Scott Niedermayer, Bryan McCabe, Zdeno Chara and Tomas Kaberle, so the reason for that was fairly obvious - and claim the Cup in 1996 over the Quebec Nordiques, but lose it badly to the Philadelphia Flyers in the 1997 Cup Final....but less than a year later, Gretzky, Gilmour and Niedermayer were sent to Philadelphia, with Eric Lindros, Rod Brind'Amour, Alexandre Daigle, Ron Hextall and their first two picks in 1999 (used on Nick Boynton and Chris Kelly) Wendel is back for 1998 on a new contract, and Lindros arrives in town to more than a little fanfare, and the 'Second Legion of Doom' is born in the Leafs mid-1998 front five - Brind'Armour, Lindros, Renberg, Stevens and Chara, with Brodeur in the net - losing to Detroit in the 1998 Cup Final, but winning the 1999 rematch and, courtesy of Boston sending Ray Bourque to Toronto for what turned out to be peanuts, because of Bourque's desire to win a Cup before retirement, repeating in 2000.
The 2000s see a quartet of absolutely terrifying teams assembled by the NHL, and 2000, 2001, 2002 and 2004 all see the same four teams - the Toronto Maple Leafs, Ottawa Senators, Detroit Red Wings and Vancouver Canucks - as the final four in the playoffs. There was a reason for this, as the teams included:
- Toronto: Eric Lindros, Mats Sundin, Rod Brind'Amour, Wendel Clark, Saku Koivu, Scott Stevens, Mikael Renberg, Brian Rafalski, Martin Havlat, Tomas Kaberle, Dave Andreychuk, Patrick Sharp, Martin Brodeur, Curtis Joseph
- Ottawa: Daniel Alfredsson, Dany Heatley, Marian Hossa, Jason Spezza, Luc Robitaille, Zdeno Chara, Chris Pronger, Sergei Gonchar, Radek Bonk, David Backes, Jose Theodore
- Detroit: Steve Yzerman, Sergei Fedorov, Brendan Shanahan, Nicklas Lidstrom, Chris Chelios, Brett Hull, Igor Larionov, Chris Draper, Pavel Datsyuk, Dominik Hasek
- Vancouver: Jaromir Jagr, Ilya Kovalchuk, Markus Naslund, Trevor Linden, Henrik Sedin, Daniel Sedin, Ed Jovanovski, Brian Leetch, Brendan Morrison, Ryan Kelser, Patrick Roy, Felix Potvin
Of these teams, all would be players well into the future, but Toronto and Vancouver, both of which by this time were spending a mint on draft scouting, were scoring and scoring big on that front - Toronto's 2003 draft haul alone included Corey Perry, Shea Weber, Clarke MacArthur and Dustin Byfuglien, all people who would be important in the future. The 2001 Cup final between Vancouver and Ottawa was one of the most intense series of NHL hockey ever played (Ottawa beat Vancouver in Six), and while Detroit's demolition of Toronto in 2002 (in six) wasn't exactly as good, the Toronto-Vancouver 2003 Cup Final topped that by an order of magnitude, particularly the wild battles - Lindros and Jagr were at each other's throats the whole series, while Kovalchuk rather unwisely proceeded to talk trash about veteran Clark, which Wendel made him pay dearly for by his big forecheck setting up the game-winning goal by Alexander Steen in Game 3. Toronto took the series, but it went to overtime in Game 7 (and a one-timer for the ages by Lindros, fed to him by Stevens) to decide it, and Vancouver fans got the heart-stopper of a lifetime when the Sedins beat Brodeur on a play early in Game 7 overtime, only for Kaberle to deflect the puck just enough that it hit the crossbar. Vancouver finally got its first Stanley Cup after two Cup Final losses in Three years in 2004, getting revenge on Ottawa for 2001 by beating them in Six.