Chris Jericho confirmed in a Reddit AMA today that he’ll finish up his current WWE run next month. Jericho was asked about balancing his commitments to WWE and to his metal band Fozzy and said:
I can’t balance both, which (is) why I only come back to the WWE when Fozzy is taking a break. My WWE stints will be more like tours now. And this tour ends September in Nashville.
Night of Champions is in Nashville on September 21st, so apparently he will finish then.