#7 SAnitY
SAnitY was a force to be reckoned with in NXT. They had a pretty dominant reign as NXT Tag Team Champions and had many top tier feuds. Giving their gimmick and coming in as a faction, there were high hopes for them when they were announced as having been drafted from NXT to SmackDown during the 2018 WWE Superstar Shakeup.
However, SAnitY would not make their SmackDown debuts until a full three months after they were drafted, and have honestly done nothing of note ever since. They have not been featured in any prominent feuds and only seem to show up on SmackDown once or twice every three months.
A top AEW star just called one of his colleagues 'spoiled' and 'narcissistic' HERE.
That being their current booking situation, makes it very understandable as to why all members of the group were not featured at all at WrestleMania. No battle royal appearance for any of them, they all remained backstage. WWE could have a really good thing with these guys, but creative just seems stumped on what to do.