I don't know where you guys are getting this info about Roaring Rapids being on its way out...
Also, just so you're aware... CraZanity was making test swings since thursday. They've also been pouring cement, which they should actually be done with by now. Should be working on landscape by tomorrow or monday. HOPEFULLY they'll take the time to rip out the brick path infront of Tidal Wave and cement it over to match the rest of the new CraZanity plaza.
But yes, the long gestating rumor for the back of the park is a new coaster. This is why the old buildings back there walled off as of two weeks ago. The Bungee upcharge attraction will either be relocated or removed entirely. And from what it seems like, as of right now, "Aftermath" will NOT be returning for Fright Fest this year (but that might also depend on construction). For those thinking its too early for construction walls back there in the wasteland that is Cyclone Bay, remember, Six Flags is now a year round park like Disney/Universal/Knotts... They dont have the luxury of having the park "closed" for several months anymore.
Apocalypse IS scheduled to go down at some point in the near future for a refurb. So we'll have to wait and see what happens. If it goes down sooner rather than later, I'd say expect that back half of the park to be closed off during Fright Fest (which is do-able. Guests can go up & over Samurai Summit to get to Tatsu) & possibly "Holiday in the Park".