It looks like "Hannibal" Season 4 can still happen according to writer Nick Antosca. The series was first announced to be canceled but showrunners are not quite ready to give up the series.
The writer was recently asked about the series and said "I can't speak in detail, but I have heard conversations about what a fourth season would be" If this is true, fan are curious where the show will air, given that NBC has already canceled it and it seems Netflix has declined on saving it. Speculations claim Amazon Prime might be the one to air the show since it is the one that holds the rights to stream its previous three seasons.
It can be recalled that Hannibal was canceled after airing its third season. Fans were devastated to hear the news especially since the finale ended with so many questions left unanswered. But in one of Antosca's recent interview, he revealed that Bryan Fuller, the show's creator, "Has a very clear and kind of brilliant idea of what he would do on another season." Since the year the series' finale aired, Fuller was also busy with two upcoming series namely "Starz's American Gods" and the highly anticipated "Star Trek: Discovery." The mere fact that the creator still planning for "Hannibal" Season 4 is a good sign that he has not given up on the series.
The only uncertain thing about the series is where will it air. Amazon Prime hold the right to stream its last 3 season but that doesn't mean anything unless confirmed by the company itself. And since season 4 is still in the planning stage, fans should not expect production and filming to start anytime soon.
"Hannibal" is based on the characters of the novels "Red Dragon" and "Hannibal" by Thomas Harris. It centers on the relationship between Dr. Hannibal Lecter, played by Mads Mikkelsen, and FBI Investigator Will Graham, played by Hugh Dancy.