Current rumor in the Republic thread is that Delta wants them to be trained in CRJs:
https://www.airlinepilotforums.com/r...js-coming.html
exactly why they think that, I'm not sure. I'd say it would be ridiculous for them to expect Delta to not give any additional CRJ flying they have to their own wholly owned but then Alaska did give some of Horizin's best routes to Skywest. Ridiculous things do happen.