#3 The Undisputed Era's dominance will eventually spill over to the main roster

We understand that you would be skeptical about us saying this, especially since there have been countless instances of superstars pegged to succeed on the main roster failing. Sanity is one such example of a faction that had a lot of promise, only to flounder and disband in a matter of time.
The Undisputed Era has been a part of NXT since the summer of 2017 and Roderick Strong joined around WrestleMania 34 weekend, completing the 4-man faction. Not only did it breathe new life into Strong's career, but it strengthened the already-dominant faction.
The Undisputed Era has now been ruling NXT for a while and in 2019, their "Evolution" moment was complete as Adam Cole became NXT Champion, Kyle O'Reilly and Bobby Fish became Tag Team Champions, and Roderick Strong became the North American Champion.
They've been instrumental in the entire Survivor Series build and have been presented as the top dogs of NXT. Their dominance will continue throughout NXT and once it's time for them to move on, they're going to be the next coming of Evolution on the main roster.
Even if it doesn't result in Fish and O'Reilly becoming major singles stars the way Randy Orton and Batista did, there's a lot of promise with them as a faction.
Becky Lynch has been challenged HERE.