"21 Jump Street" and "Amazing Spider-Man" Stars To Become Ghostbusters?

Rumours have surfaced again over the on and off again "Ghostbusters" sequels casting. This time Emma Stone is reportedly up for a role as the franchise's first female Ghostbuster, well on the big screen anyways. Once again Jonah Hill's name has popped up and he is expected to be playing one of the next generation of Ghostbusters too. He's been rumoured to be up for the role of the adult Oscar, who is Dana Barret's son in the lack-tastic "Ghostbusters 2".
There's also a rumour that he's up for some different role in the film. The roles still a Ghostbuster, but he's called Jeremy and Stone is said to be called Anna and they're set out to be brother and sister in the film.
Obviously, take all this news with a pinch of salt because again, these are all rumours. One says Hill is playing Oscar all grown up and the other is saying he's playing Stone's sister so yeah, loads of salt people.
Filming is said to begin filming in Cleveland in Spring 2014 around the time of the 30th anniversary of the original "Ghostbusters" release date. Again, we'll see how this pans out because one minute it's happening and the next minute it's not so we'll see........