If I can be perfectly honest here, I would find it hard to believe that KI would annex this area for RT. It already is a pretty lopsided part of the park in terms of coasters and for them to add another filler/new thrill coaster to it would completely screw up the feel of the park in my opinion. I think in all honesty, they should keep the Coney Mall theming, focus on the classic feel that they want in that part of the park and work with it.
There's no doubt in my mind that they could work on creating a new experience with a company like Vekoma to create a coaster at least similar in thrills to Vortex. They have the make up, they have the technology, build something better with modern technology. Which mind you, I would love to see The Vortex name or at least some form of weather phenomena used for the name as I think it worked really well with the park.
I would not advocate for a B&M Dive however. In my opinion it's way too compact, which defeats the idea of a Dive.....unless you make it go under the walk way and finally get rid of the eye sore that is the 3 Point Shoot Out aka the headache that took out our treasured and priceless Flyers. That would be a beautiful view to see and would definitely put the park back on the map for having revolutionary concepts mixed with park theming. (And totally not due to the fact that I hate the basketball games and the pop music they play that gives me headaches)