Yeah it would have to be during Empire’s production, as it’s made pretty clear in that movie in his scene that he’s into the Force("there is a great disturbance…), and that’s only taking the original version into account(no dumb Anakin lines).

I do think it’s cool how in Jedi we get to see Darth Vader kneeling before someone. And only recently I’ve thought that in SW, Vader answers to Tarkin, In ESB, EVERYONE answers to Vader, and in Jedi, Vader answers to the Emperor. Just something that crossed my mind.

I really like how the Emperor is presented in Jedi, but the prequels turned him into like the devil, which I don’t believe was ever the intention.