The Stanley Cup playoffs ended on June 4, with the Detroit Red Wings taking the championship. The 56th NHL All-Star Game was held in Atlanta, Georgia, as the Atlanta Thrashers hosted the event at Philips Arena on January 27, 2008. The hosting by Atlanta was rescheduled from 2005, when a lockout cancelled the entire 2004–05 season.
The league announced that the regular season salary cap would be going up for the third consecutive season. The 2007–08 salary cap is being increased by US$6.3 million per team to bring the salary cap up to US$50.3 million. The salary floor is at US$34.3 million, which is 71.5% higher than the salary floor during the 2005–06 season. The season featured the debut of Reebok's new Rbk Edge hockey jerseys. This was the first league-wide uniform innovation in the history of any major North American professional sports league. Seven teams (Boston, Tampa Bay, Vancouver, Washington, Ottawa, San Jose and Columbus) unveiled new designs prior to the season's beginning.
On March 1, 2007, the NHL announced the regular season would open on September 29, 2007, with the first of back-to-back games in London at The O2. They were the first NHL regular season games ever played in Europe. Both games featured the defending Stanley Cup champion Anaheim Ducks and the Los Angeles Kings (who are owned by Anschutz Entertainment Group, the same company that owns The O2).
The official average attendance per game was 17,625 per game. However, if the two games played at the O2 Arena are counted, the number is 17,309 per game.
On September 17, 2007, the NHL announced the first outdoor game in over four years would be played between the Pittsburgh Penguins and the Buffalo Sabres at Buffalo's Ralph Wilson Stadium, home of the National Football League's Buffalo Bills, on January 1, 2008. The event—known as the AMP Energy NHL Winter Classic—was the first time an NHL regular-season game had been played outdoors in the United States, and it set an NHL attendance record of 71,217 people. The only previous outdoor NHL game was the 2003 Heritage Classic played between the Montreal Canadiens and Edmonton Oilers at Commonwealth Stadium on November 22, 2003.
During board of governors meetings held on September 18, 2007, in Chicago, cities including Las Vegas, Kansas City, Houston, Milwaukee, Quebec City, Seattle and Winnipeg were discussed as possible expansion destinations. The NHL also discussed the current "unbalanced" schedule and voted on a new schedule format at a board meeting in November, so that all teams will play each other at least once and reduce intradivisional play in the 2008–09 season, in essence returning to the scheduling structure that existed in 2003–04, and would have existed in 2004–05. The sale of the Lightning and Predators teams were not completed for board approval