Chris Jericho defended his AEW World Title against Jon Moxley at AEW Revolution. He was unable to successfully retain his title and lost it to Moxley. It seems there was a reason for that.
On Wrestling Observer Radio, Dave Meltzer provided an explanation as to why Chris Jericho dropped the title at the event. Apparently, he will have commitments during the Summer, which will keep him busy.
So if they had waited until the next pay-per-view to drop the title, fans would have expected the outcome. As advertisements for his tour would have been shown, later on, fans would already guess his loss.
However, nothing is certain in professional wrestling and we do not know what AEW might have planned for the future. For the time being, Jon Moxley is the AEW World Champion.