#2 Yet another legend for The Fiend to attack, but one who can fight back
In case you haven't been paying attention, The Fiend has been attacking all the legends who think of stopping by at RAW. Mick Foley was the first, and he pretty much gave Wyatt his current finisher- 'The Mandible Claw' to use in The Fiend avatar. Then there was Kurt Angle, and Jerry 'The King' Lawler, and finally, The Big Red Machine, Kane.
Rey Mysterio paved the way for the Luchadors of today and one could call him a legend in his own right. Which makes him a legend like all of the Fiend's victim's with the notable exception that he can actually fight back against Bray Wyatt.
Maybe this leads to Fiend vs. Rey Mysterio match at Survivor Series or even a Triple Threat contest featuring the current Universal Champion, Seth Rollins. The possibilities are limitless.