The Republican Party changed dramatically in 2016. They became something they never were before and due to the populist trends in the county, they won the election. There is a very high chance that the next democrat contenders will be very different from what we saw in 2016 and 2024.
We can’t judge how same or different the DNC will be in 2028 much like you could not see Trump as a contender when Romney faced off Obama in 2012.
So, I’d say your estimate of “zero chance” is too early. Let’s see who the dems field in the midterms first.