#3 CM Punk and AJ Lee
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CM Punk made his way to WWE Backstage last year in November. This led to speculation on whether he was going to make a return to pro-wrestling as an active wrestler. Punk seems to be happy sharing his opinion on WWE's product on the FS1 show, and there's no concrete indication that we will see him wrestle for Vince McMahon again. His WWE exit was an ugly one, and it was recently reported that Vince McMahon doesn't want to work with Punk.
AJ Lee followed Punk out of WWE a year later. She was featured in a full-fledged angle with Punk and Daniel Bryan in 2012. AJ revealed a while ago that she is happy staying retired, and will not join her husband on WWE Backstage. If she isn't interested in an appearance on WWE Backstage and is enjoying her retirement from wrestling, chances are slim that she would appear on WWE TV as well. Hence, it's safe to say that we might never see these two former Superstars together on WWE TV again.
Major rumor about recently released stars HERE