Fang Zei said:

It's worth noting that the covers for ANH and Empire echo those of the 1995 Faces/THX/OneLastTime release.

They used the Emperor instead of Yoda for RotJ. They probably thought Yoda was a better fit for AotC because his lightsaber fight with Dooku is generally considered to be the standout scene of that movie.

I don't think that was intentional. Just sort of happened.

I do like the new Complete Saga artwork much better than the stupid Luke/Anakin one. When most people think of Star Wars they think of Vader, and that evokes this better. It's only really worth it for people who don't own the Complete Saga already, though.