#6 Dean Ambrose

Dean Ambrose may not be continuing his career after his contract is up shortly after Wrestlemania 35. Why not have one of his final matches also be the final match of Kurt Angle?
The two have been teammates in the past, when Kurt Angle filled in for an ill Roman Reigns, even doing the Shield entrance with Ambrose and Rollins. Also, Dean has been in the business nearly as long as Angle, and the two men are of a similar size, making the contest that much more competitive.
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It would be a contest of technical wizardly vs. top-notch brawling and unpredictability, not to mention a great contrast in characters. The Lunatic Fringe might be a good choice to give Angle and himself one final Wrestlemania moment before both of their careers come to an end after Wrestlemania 35.