This is a film of reunion (hommage) with the haunting.
You can meet your ghost who first saw the former two Ghostbusters (1984, 89) , and some more. Here comes an amusing, proton-beaming and green-sliming experience in between NY skyscrapers again.
A second shot is desired after this reunion to go beyond the legacies in the 80's and come to its own life. Next one should be a bit more serious to be more thrilling?
I ain't afraid of ghosts, you?
Soshiro