Okay I think maybe we should get a few things straight around here. I work at Universal so my sources are some what fair but as I found out Kong will be back up for the rest of the year but in next September the ride has an Eval and if its bad they can close they ride. Rumors on The Mummy, yes I heard about that also but they will not put it where Poseidon's Fury is because the theming has to do with the three main areas of the Lost Containent (Dragons, Merlin, and Unicorns and then you got Sinbad and Finally the whole myth of Atlantis). There's also rumor to an Apollo 13 roller coaster thats suppose to go behind BTTF and MIB.
As of right now I never heard about the Herc and Xena building whats going to be done, but I won't say any more.
Kong is here to stay for a while and I belive there was a remark about Kong's, Quake's, and Jaw's lines never being long?
It depends on when you go to the park. Kong, Quake, and Jaws are very popular and a big draw to the parks you wouldn't belive the people ask me where these rides are and I have to tell them they're in the other park and not IOA. If anyone has feedback on anything I said just let me know I'm open to suggestions.