#4 Sanity
Down in NXT, the quartet of Eric Young, Nikki Cross, Killian Dain, and Alexander Woolfe, collectively known as, Sanity, were a revelation, and with their unique style and success, many people saw them as bound for success on the main roster.
Not only have they not achieved any of that success, but they've barely been featured on TV over the past 6 months, and while that can change, we aren't holding our breath.
On their own, none of the three men would likely be overly successful in the WWE, but trying to introduce the WWE to chaos is a fantastic, unique idea, and we have absolutely no idea why the company won't get behind them.
A few of the members of the group have expressed frustration on social media, and while leaving as a group is rare, that's the best thing for them to do, because they have serious potential that the WWE are clearly ignoring.