#2 The Rock Vs. Triple H

At this point, WWE definitely needs a marquee encounter to hype WrestleMania 35 in advance, and while the Big Dog's absence will hinder them, reigniting the Rock Vs. Triple H could prove beneficial.
Since the Game has always been interested in working one more match with the Rock, the Great One's involvement in this marquee feud could make things more interesting.
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With both superstars having enough box-office pull, Vince McMahon could book this encounter for the main event of the Grandest Stage of Them All.
There's no denying that the company lacks a superstar with a presence and booking similar to Roman Reigns, and therefore could rely on more nostalgic storylines to sell this year's event.
Both the icons have garnered tremendous respect from the fans throughout the years, and bringing them together under one roof for one last time could make things a lot more exciting and compelling.