It’s been a tad unclear, however, which rights are coming back, as it’s assumed that Amazon’s exclusive streaming rights to Hannibal’s first three seasons will be expiring at some point this year — those rights were essentially the reason Netflix didn’t go further with conversations about a new season — and it’s also likely that the production company Gaumont will also be losing its rights to Hannibal in the near future.
Here in August 2017, it appears rights to Hannibal have reverted back to Martha de Laurentiis, as hinted at above in the “two years after the finale” comment.
If both of those situations are simultaneously happening, that would be the best thing for everyone.
(Or if they haven’t, that switch is imminent enough to inspire confidence.)