There are other things to be noticed too that aren't really Ghostbusters tie in's but more of that era tie in's. Like in issue 1 in Ray's dream at the beginning of the book the Blues Mobile is parked on the road where the Ray Puft Marshmallow Man is walking down, which ends up making sense since Ray has a talk with Jake Blues in his dream in the issue (and again in issue 4).
In issue 2 there's a panel where the Ecto 1 is driving on a bridge going one way and on opposite side going the other direction is the Real Ghostbusters toy "The Highway Haunter", a VW Beetle convertible that turns into a mantis looking spook. Also towards the end of the book there's a child in a stroller that looks strangely like Egon from the Real Ghostbusters.
On the 1st page of #3 the terror bear has launched K.I.T.T. from Knight Rider into the air, while latter on when the boys are on the bridge with a flat tire the A-Team drives past them and the driver calls out the window "Ghostbusters suck!" In that same panel there is a blue person (possibly a ghost or something) standing on a bridge beam above them, I don't know what or who that is suppose to be though.
In #4 the helicopter pilot to me looks like Kareem Abdul Jabbar's character from the movie Airplane, but maybe I'm wrong. And when Ray runs off with the megatrap to take care of Stay Puft the tenant of the apartment he goes into is a character played by John Candy on the late 70's and early 80's tv show SCTV.
In issue 5 the clown at the beginning of the story looks a lot like Pennywise the clown from the ABC mini series Stephen King's It, and you may notice the store Shandor's Soda Shoppe in the block of stores. After leaving the gym with Peter, Egon notices whoever that was that he noticed and standing beside him would be Bobby Brown how he appeared when he did "On Our Own" for the GB II soundtrack, and I'm only assuming that is a younger Whitney Houston (R.I.P.) standing next to him.
I haven't really noticed anything from issues 6 or 7. Has anyone else noticed anything else from the series?
"Wow! This place is great, when can we move in? You've gotta try this pole!" - Dr. Raymond Stantz
"We have the tools, we have the talent!" - Winston Zeddemore
"We eat Gods for breakfast." - Dr. Egon Spengler