#2 - 'No Clear Winner'
This is definitely my personal least favourite of all five options, but one I can definitely seeing the AEW higher ups executing on Saturday night, as they look to keep both Jon Moxley and Brodie Lee strong.
Much like the previous point, the idea of a double count out or a finish where Moxley and Lee are deemed 'unable to compete' would enable both men to get out of the match with neither eating a loss - and Moxley keeping his title.
Whilst there are several creative ways of doing this, especially with no fans being in attendance, as seen with WWE's recent 'cinematic' style matches. It certainly does run the risk of angering the audience watching on pay-pay-view, though. Generally, wrestling fans don't agree with the idea of a major world championship match not having a conclusive finish. These sorts of finishes can devalue a championship and take away from the big fight feel at the end of a bout. It would be controversial for AEW to go in this direction with the Jon Moxley Vs. Brodie Lee match.
However, if AEW do it correctly, it could work incredibly well. It would either set up an immediate rematch with a stipulation - or the promotion could move on to other feuds for both men. The option to return to story between Jon Moxley and Brodie Lee would always be there at a later date for AEW.