You heard correctly, but that was related to the Damar Hamlin situation rather than some “ experiment “. More just a “ fair” solution to Buffalo if both the Chiefs and Bills qualified for the AFC title game. The Bills ( and Bengals) played one less game than KC, and the Bills had a head to head win over the Chiefs so this would only have taken place if that matchup materialized. As we all know, Buffalo was eliminated in the divisional round. At the time, the NFL did say that neutral site Championship games were probably happening down the road.