#1 Vince McMahon is extremely high on Baron Corbin

Undoubtedly, the biggest and most pivotal reason why Corbin could win the King of the Ring tournament is because of Vince McMahon's backstage support. As reported by Sportskeeda's own Tom Colohue, the Creative is a huge fan of the Lone Wolf for various reasons.
Vince loves to push big guys and heavyweights like Corbin. Therefore, it doesn't come as a surprise that Corbin is so high on his priority list. Vince's trust on Corbin is such that the former United States Champion was chosen to defeat the legendary Hall of Famer, Kurt Angle in the latter's final match in WWE. In spite of all the backlash and resentment from the WWE Universe, Vince continues to put his trust in Corbin.
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Given Corbin's relationship with Vince, it's almost a certainty that he will win the King of the Ring tournament. Recent reports suggest that Vince is being talked out of pushing the former Acting General Manager of Raw, but it doesn't look like Vince would want to abruptly end Corbin's push. Regardless of what fans or backstage officials think, Vince is hell-bent on pushing Corbin.