#4. Sheamus
Former WWE Champion Sheamus has been out of action for a while now, after the split of The Bar following Cesaro's move to RAW. Before that, Sheamus had suffered a concussion during a match against New Day on the SmackDown after WrestleMania 35.
Also Read: WWE News: Sheamus unveils new look and possible new role
We haven't seen Sheamus since on WWE television, but he has been quite active on his YouTube channel, Celtic Warrior Workouts. He also recently posted pictures of him in referee gear and a new look.
It is unsure, at the moment, if Sheamus will return to the ring, as various injuries have taken a toll on his body. But Batista recently revealed that Sheamus is ready to return to the ring and that he has not been on television because WWE did not have anything for him at the moment.
We could perhaps see him return at SummerSlam, this time as a singles Superstar, for maybe one last run at the WWE Championship, which would be quite interesting.