#1. Neville

Neville was one of the best wrestlers to be a part of the WWE roster and the WWE 2K18 roster.
After knowing he was going to lose to Enzo Amore on an episode of Raw, Neville decided to walk out of WWE and wait until his WWE contract expires.
Neville might have got his wish come true: He is released from his WWE contract this week. The former King of The Cruiserweights might very well not be seen in WWE 2K19 after his release.
The former Cruiserweight and NXT Champion single-handedly revived 205 Live was never given an opportunity on the main roster. I wish him good luck for his future endeavours, but sadly WWE 2K18 was the last WWE game we might see him.
Neville will surely become a man 2K and WWE forgets in WWE 2K19.