Bryan Fuller posted this on Instagram as a birthday greeting to Laurence Fishburne, back on July 30.
So apparently Fuller had intended to carry over the Hannibal cast into Discovery in various parts — and this was how he'd imagined Fishburne in Klingon prosthetics. It also suggests that the much maligned Disco Klingon designs were decided upon after Fuller left as (preliminary) show runner.
ETA: Here is a rundown of the casting plans he had in mind, originally revealed on the D-con chamber podcast. I would have watched Gillian Anderson as a starship captain.
Ah well. People would've complained about that design as well. Probably also if they had just continued with the Worf-like looking ones. They look the same as before? No innovation? Yawn.
We're hard to please. Remain Klingon!
K'LawRence would have been interesting. Who's the best actor to play a Klingon that hasn't been cast before?
Honestly? Also Gillian Anderson 🤣
I haven't met a single person who disliked the look of the DSC Klingons and wasn't also a chronic complainer in general.
Also the answer to your question is clearly Robert De Niro.