First of all it made me smile. It was like a combination of the Library scene and the egg scene from the original plus The Real Ghostbusters cartoon. In Ghostbusters canon, if Gozer is going to return to this universe, it has to be in the form of Stay Puft. So Gozer may be coming back. What we see isn’t necessarily due to Gozer though, as just about anything can become animated if it’s infected with ectoplasmic energy.