Someone mentioned Scott Hall and that would be a good episode for Season 5. How about one on Dixie Carter and TNA - some wrestlers thought she was great, others a complete disaster. Maybe she played a major role in TNA not reaching its full potential as a legit rival to WWE...at least not on the level of AEW. Could make for a lighter version of the Dark Side of the Ring
Jeff Hardy might be an interesting episode although it might be a bit difficult getting interviews given he is still wrestling. I remember hearing about his main event bout against Sting years ago for a PPV and he came to the ring completely wasted. Sting had to signal to the back that Hardy couldn't compete and they had to schedule an impromptu match with some other wrestler. Just a complete disaster. So much wasted potential with Hardy. He would have likely had a few runs with the WWE championship if he managed to stay clean.
Any potential for episodes on ECW stars besides Mike Awesome, like ones covering Spicoli, Sabu, the Sandman? Maybe all of them in one episode or just a focus on ECW's penchant for violence that likely played a role in wrestlers having to resort to painkillers?