"Yes, I got a call from Ivan Reitman... I just said, 'That would be fun and please make sure my little son Oscar grows up to be a Ghostbuster'. And he said, 'Absolutely'. Then I think he directed this other film and is busy editing it, so it kind of got put on hold. But I would be surprised if we didn't do it." Sigourney Weaver confirms she's back on board the planned Ghostbusters sequel and hopes her character's onscreen son joins her in the new picture.