Pro Wrestling Sheet is reporting that Nia Jax is suffering from ACL tears in both knees and the injuries will require surgery to be repaired.
However, neither WWE or Nia has confirmed the ACL tears but Nia has confirmed on Twitter that she's going to be gone "for a little while", which is a good indicator that she's taking time off due to injury. If Nia has ACL tears in both knees then, depending on their severity, she may easily be out for the rest of the year.
I don't wish injury on anybody in wrestling, but I can honestly say that I'm not exactly gonna miss her if this is legit. I'm just not remotely a fan of Nia Jax, or Tamina for that matter, and feel there are vastly more talented women on Raw, SmackDown and NXT rosters.