Quoted from Rarehero:
Don't assume that everyone is in the market for the same title. Stern has been successful by always having a catalog of titles available for customers to purchase. New games don't "steal sales" from other games. They'll all find buyers.
I don't assume, but I believe that Star Wars or Ghostbusters theme appeals to the same crowd that like Game of Thrones. They are also "dream themes" that at least I know will spark my interest if GoT Prem. is delayed. I am sure there are a lot of others out there like me.
Now if the next game announced is say another music band themed game I would not be interested one bit. Just my opinion.