On the topic of potentially relocating RailBlazer to KD...
Though I'll admit the coaster would be a great/thrilling addition to the park, and also be unique in terms of competing with BGW offerings. I'm not sure if it would make sense to replace Volcano, a ride which suffered with capacity, with another capacity-strained one... where RailBlazer I believe is around 600 riders per hour.
And as RailBlazer's ride duration is fairly short, if it were ever to be located across from Tumbili, I'd hate to think how both coasters would be critized for their duration. (Of course, not that Volcano was a long duration either, at just over a minute.)
So with whatever is eventually built in Volcano's old location, I'd certainly hope that it improves on both of these aspects.