I think that already started to happen, which is why they started converting deluxe rooms into DVC rooms. They helped prop up deluxe pricing by reducing supply, which helped prop up DVC buy in cost.
What happens, though, to your point, when these DVC members start flooding point rental markets? Or conversely, start selling off? Disney surely can't ROFR them all. There wouldn't be a market to resell them direct. Would resort pricing finally turn the other way? It's fascinating to watch, even though I don't want any of it to happen as it would be bad economic times for most of us on a macro level if that's what happened.