#4 The Undertaker moves to Raw

The Undertaker would, over time, become synonymous with the SmackDown brand. In the latter stages of his full time career, The Deadman took up residence there, often as not in the brand’s World Heavyweight Championship picture.
But what if the World Heavyweight Championship had stayed on Raw?
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There’s no guarantee The Phenom would have followed that particular title, but a good chunk of his 2006 and 2007 were dedicated to feuding with Batista. The program better established The Animal, while also providing the newer star a mentor big man to work with and learn from.
It seems quite feasible WWE would have stuck with its plan of binding The Undertaker to Batista even if the latter had stayed on Raw. Thus, if Batista and John Cena hadn’t swapped brands, The Dead Man may well have jumped to Monday nights.