Chris Hero returned to NXT as Kassius Ohno last week after a little over three years away from WWE developmental. All that happened in between is that he became arguably the best professional wrestler in the world.
It's not that Hero didn't enter developmental in 2012 as an excellent performer. He was a genuine independent wrestling star even then, having worked for Ring of Honor, Pro Wrestling NOAH, and seemingly everywhere else across the globe. He had developed as an elite in-ring talent by utilizing a unique style that was shaped by those experiences and his knowledge of pro wrestling history.
But Hero reenters WWE better than he has ever been because of how he has further dedicated himself in the ring since being released. And he does so after having had more outstanding matches than anyone else did in 2016.