#3. Brock Lesnar - WWE's last larger-than-life Superstar?
Brock Lesnar is the only Superstar on this list who technically isn't even signed to WWE. However, there seems to be little doubt about his return. The ship has likely sailed on a final UFC run, and WWE offered more to Brock Lesnar when he last had both companies negotiating for him.
UFC president Dana White said that Vince McMahon "threw the vault" at Brock Lesnar, which is indicative of how important he is to WWE. Brock Lesnar stopped appearing in WWE's pandemic era post-WrestleMania. It was rumored that WWE didn't want to bring a larger-than-life Superstar for empty arena shows.
Crowds are expected to slowly return to WWE in 2021 (with WrestleMania 37 being the first event in over a year with fans), and when they do, Brock Lesnar will likely have his return in place.
While Brock Lesnar's limited in-ring set over the last few years has been criticized, he has proved on numerous occasions that he is one of the best when he chooses to be.
It's not hard to see why WWE finds Brock Lesnar irreplaceable - as Goldberg is arguably the only other star with a larger-than-life feeling.