#4 Ken Shamrock wants to return to WWE

Ken Shamrock was an important member of the WWE roster during the Attitude Era and was last seen in the WWE in 1999, leaving the company to pursue a career in MMA. Shamrock has since wrestled in indie wrestling as well as a brief spell in TNA.
In an interview with Adam's Apple YouTube channel, Shamrock revealed that he was ready to return to the WWE and that he has "some unfinished business there".
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
"WWE is something I’m looking at. Definitely have been throwing little feelers out there to get an opportunity. Because I have achieved everything that I have set out to do in every organization except the WWE. I didn’t get the world title. I got everything else but that," said Shamrock. (H/T NoDQ for the transcription)
Shamrock said that he hasn't had any response from the WWE but he would like to return: "There’s some unfinished business there, so I’ve always kind of been throwing feelers out there, saying, listen, I’d like to go back and get a run at the title. But, no response up to this point. But we’ll see what happens.”