I think it's safe to say that Game of Thrones was an undeniable hit and it isn't a surprise that HBO would want to capitalize on that fandom with a few spin-offs.
For a while there, it seemed like every big name in Hollywood was attached to one of the many in development, but when the show's finale landed as roughly as Bran being pushed from a tower (too soon?), we were left to wonder if any of those projects would still happen.