Extreme Rules

Name Change
Extreme Rules was an official Pay Per View beginning in 2009. Prior to 2009, Extreme Rules was known as One Night Stand, with 2005's version of One Night Stand being dubbed an ECW reunion with all former ECW Superstars competing on the card. In 2006's version of One Night Stand, it was also an ECW reunion but was with WWE vs. ECW Superstars before officially being a WWE Pay Per View. In 2009, One Night Stand was given a name change due to WWE's PG policy taking place and One Night Stand sounding like a sexual hookup that wouldn't suit itself to the audience as well and thus was changed to the name of Extreme Rules.

Theme
Extreme Rules has a theme where every match is some type of stipulation related to the old ECW ways, whether it be a Stretcher Match, Extreme Rules Match, Street Fight, Ambulance Match, etc. Some matches were changed in the latter years of Extreme Rules beginning around the 2013 year where some matches are just regular Singles Matches with no theme of violence, weapon-based, and hardcore-theme to them.