#3 Brock Lesnar walks away for good

Brock Lesnar has been one of WWE's biggest finds in the last 25 years, and one that had a massive impact on the promotion. Lesnar, who debuted way back in 2002, had just a two-year run with the company, walking away from the company at WrestleMania XX.
He then before tried his hand at NFL, before becoming UFC Heavyweight Champion, and then returned to WWE once again in 2012.
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Lesnar, who is in the eighth year in his second run with the company, has achieved quite a lot, but it has come at a price. Fans have turned on him time and again, mostly for him being a part-timer and being catapulted to the top of the card time and again. Despite the brickbats he has received, Lesnar is an important figure in the recent history of WWE, and has helped tell fantastic stories in the ring.
Could 2020 be the year that Brock Lesnar walks away from WWE, just like he did in 2004, but this time for good?