#2 The Miz
The Miz defended his WWE Championship way back at WrestleMania against John Cena. However, that was a very different Miz character. Since then he has exponentially reinvented himself. Moreover, he has become a multi-time Intercontinental and Tag team champion.
Being the closest to defeating Chris Jericho's extensive Intercontinental championship accumulation, it would seem WWE would head in that direction. However, The Miz has performed brilliantly in recent years helping to elevate the Intercontinental championship and both Curtis Axel and Bo Dallas in the Miztourage, see the video below.
Effectively The Miz is ready to challenge once again for the WWE Championship. He has the experience and credentials. Moreover, he has an excellent ability to perform with any individual. The Miz defeating AJ Styles would elevate his career and legitimise the championship.
Will WWE play out this scenario?