#2 Ember Moon

Former NXT Women's Champion Ember Moon suffered an injury last year, which will keep her out of a WWE ring for a long time. Moon's Achilles injury will keep her out for an "indefinite period" which she revealed last year on WWE Backstage.
In an interview with WWE Hall of Famer Booker T, Moon revealed how she sustained that injury. She said that while she was chasing Carmella on SmackDown in the hunt for the 24/7 title, she injured her Achilles.
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“So they go through the curtain and they didn’t realize how close I was behind them. As I’m coming through, the curtain shuts, I open it, go through. Truth is dropping Carmella and I’m going full speed and I had to hit the brakes. I was just like, ‘whoah,’ BOOM, and I felt a pop.” (H/T Pro Wrestling Sheet)
The injury all but rules out Moon for this year's WrestleMania, and it will be quite a while before we see her in the ring. Moon has appeared a few times on WWE Backstage since her injury, and we could see her in that capacity for the weeks and months to come.