Actually, accordint to at least popular rumour, Murray wanted GB2 to be subtitled “The last of the Ghostbusters”, partly out of fear of ruining a good thing.
But on this topic's point. Online petitions have been done to death, they have achieved nothing and will never achieve anything, they catty no weight. A letter protest carries more weight due to them being physical objects, but have only slightly more success.
Dan's no longer a part of Sony, so our ‘insider’ is no more (Huh, sounds like Gavin from Mainframe
)
With Dan gone, and both Dan and Harold given up on the premise, GB3 will never get the force it needs to be made.
Furthermore, as stated, without Bill's fifth of the rights, there's no dice. The movie won't take off as long as Bill won't play Dr. Peter Venkman, and to be honest, it's not Ghostbusters without Dr. Peter Venkman.
Also, just because Dan wrote a new script, doen't ensure it's a success, for recent reports from ProtonCharging and such, Dan's most recent script, left much to be desired by GB fans, will all intended respect to Dan of course.
I think the only way we can get GB3, is in either fanfics, or fan films.
Sorry guys.