EPL domestic TV revenues going down, perhaps pausing the nonstop money increases we're seeing clubs get. PL will continue to get richer based off of foreign TV deals, 2022 looks like a huge year with China, Sub-Saharan Africa, and US deals all ending that year. Wouldn't surprise me to see new deals for those markets netting the league an extra billion + per year.
At this point, EPL should just embrace it and be the money league. They already have a big six, and Everton looks like they want to go the City route to get in the conversation. I would also keep my eye on the Newcastle situation, they have a big fanbase and good revenue, and would be a really good target should a billionare decide they want to spend a club to the top.