#4. Former WWE NXT Champion Bo Dallas
Former NXT Champion Bo Dallas was seen as a future WWE Champion.
However, when Dallas was promoted to the main roster in 2014, his career started to go downhill. The former champion unveiled his popular "Bo-Lieve" gimmick but was unable to break the glass ceiling.
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Bo went on to be part of several storylines over the years before he was finally aligned with Curtis Axel as The B-Team. The duo went on to become Tag Team Champions. In November 2019, Dallas asked for some time away from the company.
After Axel was released in 2020, it became clear that Bo Dallas also wasn't returning to WWE anytime soon. The latter was released in April 2021 as part of WWE's budget cuts.
At the time of his release, Dallas had already started preparing for life outside of the company, working in Real Estate.