Anyone is free to try and make this happen, because I don’t have the prowess, but what if every Star Wars movie had its own post credit scene? What scene would you give to each movie? Personally, I think this would work great for ROTJ: https://vimeo.com/137925493
The deleted scene of Yoda on Dagobah would be cool for ROTS as well.
I might be a jerk for saying this, but I would never have a post credits scene for any Star Wars movie. Period. To me, post credits scenes are better served in Marvel movies where the whole point is to entice you with sneak peeks into future movies. It works in a comic book sort of way, since a lot of comics end with cliffhangers. Star Wars, while it does share influence with comics, is better off without them. The only place where it could work might be in The Mandalorian, but only because it’s a TV show that promises episode after episode after episode. But as for the franchise itself, it’s just three movies every 10 to 20 years. What’s the point?