Brooklyn Nets
After the Nets' move to Brooklyn, the team introduced a new superhero mascot named BrooklyKnight (a pun on the demonym "Brooklynite") on November 3, 2012. In his first appearance, he was lowered from the ceiling of the Barclays Center amid sparks and fanfare and introduced by Nets PA announcer David Diamante: "Here to defend Brooklyn, he's the BrooklyKnight." The mascot was co-created by Marvel Entertainment, a sister company to NBA broadcasters ABC and ESPN. The character also starred in 32-page comic book published by Marvel titled "BrooklyKnight #1", written by Jason Aaron with art by Mike Deodato. After the Nets' second season in Brooklyn, the BrooklyKnight mascot was retired.
Mets–Yankees rivalry
With the arrival of the Major League Soccer to the city in the 1990s and with now two teams based there (the older New York Red Bulls and the newer New York City FC, which plays currently in Yankee Stadium), the rivary between the baseball fans has not expanded to the same level as in other sports, through these soccer clubs' fanbases share the same hatred of the New England Revolution and Philadelphia Union with the fans of the other NYC-based pro sports teams, whilch have the same hatred for the Boston pro sports teams and their athletes and coaches (and for Mets fans, teams from Philadelphia). Fans of the Yankees today, due in part to the team's part ownership of the newer club, would tend to support their home matches at Yankee Stadium and away matches while Mets fans support the much older Red Bulls, which play in New Jersey, some Yankees fans, through, support the Red Bulls because of it being the city's more established soccer team in the MLS proper. In the National Basketball Association, Mets fans tend to back the New York Knicks, which shares the same colors with them, while Yankees fans support the Brooklyn Nets which they owe partly to YES Network, the current television broadcaster, which was the result of the YankeeNets LLC creation in the late 1990s as part of the brief merger of the teams' business functions as well as the fact that current radio announcer John Sterling previously was the PBP man for Nets broadcasts in the 70s, however some fans of both teams do it the reverse way around (Yankees fans supporting the older Knicks, Mets fans the younger Nets team based in Brooklyn). Fans of both teams, regardless of baseball team support, share common hatred of the Boston Celtics, while Mets fans shared their hatred as well of the Philadelphia 76ers regardless of being a fan of either one of the two teams or both.