And as you should see from the the thread I linked, that is exactly how it happens. A completely automated process whereby the top teams who did not win their leagues are selected to fill any additional openings.
The post I linked says there are 5 teams who did not win their championship but finished 22-0. There are at least another 9 teams who did not win their league who are 21-1. An earlier post in that thread had said that there would be at least 8 bot promotions and possibly up to 10.
So assuming the information in those posts are correct, you can identify the teams who will be promoting to replace the teams which are being replaced because they lost owner rather than are being relegated based on record.