Worst Option - Shane McMahon
If WWE really wants to enrage fans and have them stop watching its programming, then having Shane McMahon be the one to dethrone Kingston would be a mistake of astronomical proportions. Reports of this possibility even came out last week.
McMahon already takes up too much time on both Raw and SmackDown. It's mostly at the expense of some heels that could use the chance in the limelight (Andrade, Elias, Bray Wyatt, Aleister Black). Having him win a major title and win it from a huge fan favorite will only turns fan off.
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McMahon can win a match here and there, but if he continually is beating some of your top stars like Miz and Reigns, then you are devaluing those wrestlers in order to make the non-wrestler look good.
I know that he didn't outright own the Miz or Reigns in any of his matches, but as he has boasted, he is 4-0 against the two men. The end game cannot be a WWE Championship run. It would only prove that WWE has lost their minds and that All Elite Wrestling will be better. If they want another 'if Cena wins, we riot' moment, this would be it.