It’s fair to say virtually all the big names involved with Sherlock are quite busy. Moffat recently got a new Amazon show, The Devil’s Hour, greenlit, and Gatiss was just announced to be in Mission: Impossible 7 and 8. Additionally, both Freeman and Cumberbatch remain in-demand, and they’ve got their commitments to the Marvel Cinematic Universe. Freeman is expected to return for Black Panther 2, and Cumberbatch is in the midst of filming Doctor Strange in the Multiverse of Madness.
With all that in mind, it’s hard to say when a Sherlock season 5 would be feasible. Cumberbatch’s suggestion of a film has some merit and could even be easier to put together than another run of three hour-and-a-half episodes. However, one also has to consider whether more Sherlock is necessary. The story of Sherlock and John was wrapped up fairly well in the last episode, and some might wish to just let the show be. On the other hand, there are always more Sherlock Holmes stories to dig into, and there’s hope among some fans that future installments could provide a more satisfying bit of closure. Like Cumberbatch said, it’s good to never say never, but it might be best to not get one’s hopes up too high.
Originally from https://screenrant.com/sherlock-season-5-movie-possible-future-benedict-cumberbatch/