#1: Cyber Sunday
This isn't just one match type, but a whole Pay Per View, as the WWE should strongly consider bringing back Cyber Sunday.
Originally titled Taboo Tuesday, the show received it's more PG name in 2006, and revolved around a simple concept, giving the WWE Universe the power to control the show.
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This power would come in the form of fan polls, as stipulations, opponents and other parts of the show were decided by the fans, giving an aura of mystery to the event.
Though some matches were better than others, fans could always prepare to expect the unexpected at the show, which was a huge part of the fun.
In an era with several shows having stipulations built into them (Hell in a Cell, TLC, Money in the Bank etc), having Cyber Sunday could be a huge night of excitement for both the WWE and its fans.
With WWE citing themselves as a social media powerhouse in 2019, bringing back Cyber Sunday could be a great idea for the company, and help to prove they are still willing to listen to the fans.