The trend is each major will have one or more WO or partially owned that are obviously single carrier. Plus two triple carrier mega regionals in Sky/Rep. Finally the remaining ones - all three TSA holdings, plus Mesa and Whiskey I think will be the wild card. They may trend to single carrier (mostly with UA), merge, or die. Hard to tell. Whiskey and GoJet were saved at the bell - so just when you think you have it figured out, you don’t.
So I’d say the trend is that there will be three catagories of regional. WO/Partial; Multi-Carrier mega regionals; and Other.