The first and most obviously essential component in order for a series to return is for the cast to be enthusiastic about such a prospect, and according to Bryan Fuller, all of Hannibal's are particularly keen on reprising their respective roles.
Both Hugh Dancy and Mads Mikkelsen have publicly declared their willingness to reprise the roles of Will and Hannibal respectively, and it wouldn't be a long shot to imagine that Laurence Fishburne would also be interested in returning as Jack Crawford. (Might I add that Fishburne's performance as the FBI director is one of his finest ever? Because it is.)
Given there's such a high level of enthusiasm to pursue the project from both Fuller and its stars, it would be daft to throw away such an opportunity. Season 4 may be out of everyone's hands given the rights situation, but when Dancy and Mikkelsen have both responded so positively to Fuller's plans, it doesn't make the frustration any easier.
WhatCulture's very own resident movie guy, Ewan has been working in the content creation biz for over 10 years now, having started as a freelance contributor to WhatCulture Gaming all the way back in 2015. After graduating with a First-Class Honours in History from Northumbria University in 2017 (where he won a prize for a totally killer dissertation on the Watergate years), Ewan took on the role of Comics Editor at WhatCulture and quickly developed WhatCulture Comics into one of the biggest superhero-focused channels on YouTube. He followed this with a brief hiatus at Screen Rant in 2021, where he worked across the Gaming and Film sections as a writer and editor, before returning to WhatCulture as a Senior Content Producer / Presenter in 2023. He started his own podcast, We Love Dad Movies, in 2022, and has contributed several written pieces to the Eisner-nominated comics website Shelfdust as well.
In his current role, Ewan incorporates his love of cinema, comic books, and history into written pieces and video essays for WhatCulture's Film & TV channel, as well as WhatCulture Gaming and WhatCulture Horror, with a particular focus on nineties-era Dad Movies, old school Westerns, and Golden Age Hollywood Noir. John Carpenter is his fave, and he thinks Batman Beyond should never have been cancelled. If that's your vibe, you'll probably like his stuff.