Bray Wyatt and his brother, Bo Dallas, have not been at WWE events since the October 2nd RAW. Ring announcer JoJo Offerman has also been absent during that period. Justin Labar of The Pittsburgh Tribune noted on Twitter that they missed the events due to viral meningitis. Depending on the severity, symptoms can last from 7-10 days to several months. 

Below is the tweet

Seems Bray, Bo and JoJo haven't been at TV or events because of viral meningitis. Unfortunate. I have NO INFO on Sunday for Bray.

, Justin LaBar (@JustinLaBar) October 18, 2017

Another source on Twitter who has broken news in the past has reported the same exact thing. 

Bray, Bo and JoJo have been off TV due to an illness. I will not report personal details, however that is the reason.

, Pro Wrestling Votes (@WrestleVotes) October 18, 2017

I am hearing other Superstars may indeed be suffering from the same illness, and it may drastically impact Sunday's PPV event.

, Pro Wrestling Votes (@WrestleVotes) October 18, 2017