I found some Ghostbusters info for y'all.
It appears that the little baby from GB 2 will be a Ghost buster.
Bloody Disgusting has the story:
Much like Steven Spielberg did with Indiana Jones and the Kingdom of the Crystal Skull (where Mutt Williams is Indy and Marion's love-child), Ivan Reitman is looking to kick-start a new franchise with a ghost bustin' love-child of their own.Interesting... I keep y'all posted.
Early word from an insider is that the (hinted at) love affair between Dr. Peter Venkman (Bill Murray) and Dana Barrett (Sigourney Weaver) has a much bigger impact on the franchise than just an angry Vigo (Wilhelm von Homburg).
From what we're told, it will be revealed that Dana's son Oscar is in fact Peter's child as well. Furthermore, Oscar is now 21-ish and ready to take the reigns of his father's ghost busting business!
It's an important plot point as it gives a lot of weight to the actual story, and takes it from being "just another sequel" to having a real purpose (so long as they don't pull an Indiana Jones IV).
In addition to the four Ghost Busters, Rick Moranis (who will be coming out of retirement for this) and Sigourney Weaver are expected to return as well. Still no word on how close the film is to actually going into production, but word has it things are actually progressing nicely (contrary to what Murray is saying).