GB is also as far away from horror as possible, ghostbusters would fit in more at not so scary than horror nights. It's one of the most popular games of these past couple years and with its devoted fanbase, third game coming out (this year) and possible movie later down the line, it's far from "a flash in the pan mobile game". It's pretty unlikely it'll happen, you could easily see it happening more than most IPs people are throwing out thereGhostbusters (if they go the interactive route), one of the most beloved franchises and recognizable brands, is more unrealistic then a less-than-1 year flash in the pan mobile game? OK.
It's more likely that a spoof Chuck E. Cheese with haunted AA's happens at HHN instead of them grabbing the IP rights of FFAF, but still unlikely..