#5 Shield Reunion

As Roman Reigns haters will tell you, once Vince gets an idea in his head, there are no lengths he will not go to to get it over.
Last year's ill-fated Shield reunion left fans scratching their heads at just how things went so wrong, and truth be told, it was just plain bad luck that prevented the whole thing from working. Reigns' illness wrote him out of their original match, and the group never recovered the momentum they had lost following his return.
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With Survivor Series, an event where the WWE has famously liked to cash in on nostalgia acts, coming a few months after SummerSlam, another Shield reunion might be just the kind of thing the company will want to try and build the event around.
Fans are currently speculating that the WWE may want to go with a Shield triple threat match at WrestleMania 35 for the Universal title, and a brief reunion between the trio may be the perfect way for them to set that match up.