World Heavyweight Championship), with the now-defunct World Heavyweight Championship defended in the main event once, and in 2011, the main event was a non-championship match. In 2014, Night of Champions became available on WWE's online streaming service, the WWE Network, in addition to traditional PPV. In 2016, Night of Champions was replaced on the PPV schedule by the similarly themed Clash of Champions. Concept The concept of Night of Champions was that every championship promoted on WWE's main roster from 2007 to 2015 was defended. Originally, the theme was that every active championship promoted by WWE was defended, but after the establishment of NXT as the promotion's developmental territory in 2012, which introduced its own set of championships, the theme from 2012 onwards was that only WWE's main roster championships were defended. In 2010, non-title matches began to be included on the card as less championships became available due to WWE unifying several titles that eventually led to the dissolution of the first brand extension in August 2011; after the final title unification in December 2013, WWE had just five titles on their main roster through the 2015 event. In total, 10 different WWE championships were defended at the pay-per-view over its nine events. Notes Events See also List of current champions in WWE List of former championships in WWE References External links Recurring events established in 2007 Recurring events disestablished in 2015