Ivan Reitman just issued an official statement via Eric Reich, who handles publicity for The Montecito Picture Company, Reitman's company. It's very pointed, and I think there's a rock solid reason for him to make the statement right now. Here it is, exactly as it was sent over.
"There has been a lot of excitement recently about what is happening with the Ghostbusters franchise. As the producer of the new Ghostbusters film, I feel the need to clarify. There is only one new Ghostbusters movie and that is the Paul Feig directed version coming next July, presently filming and going fantastically. The rest is just noise."
First, what I see here above anything else is a producer standing behind his director. He is right. Paul Feig is the only person making a "Ghostbusters" movie right now. The more I see from Feig's film, the more I'm excited to see how it all comes together. I am already absolutely fascinated by Kate McKinnon's character's appearance, and I like that they've retained the handmade aesthetic of the original.