Predicting Delta's regional plans is like crankin' one out to a picture of your sister. No matter what you do...it just won't ever be right.
They switch flying amongst carriers like it's a hobby. Ask any formerly MCO based RAH pilot when the biggest base went from open to closed in a year and all the flying transferred to Freedom. Other examples include flying at CVG, SLC, and I'm sure JFK eventually. God only knows what a merger would do (and I think even he's a lil' fuzzy on the subject).