From what I have gleaned from different forums, it sounds like SF will probably make a bid for the Palace Corporate chain of parks (which is currently for sale) Here is their entire portfolio of the places they own. https://www.palaceentertainment.com/pick-a-park
That would be, ummmm, interesting? There's a number of parks there that don't seem to fit into Six Flags' normal portfolio. Three Boomers and a couple of other FEC's, and several independant water parks. Some of the smaller "theme" parks would also be curious additions. Castle Park in Riverside? Just have a hard time picturing that as a Six Flags run park.
Then there are the couple that I'm not sure I want to see Six Flags have their hands on: Idlewild, Lake Compounce and Kennywood. it certainly would make me concerned about the future of a couple of the parks on that list.