I think I'd try to look at the ingredients that made the originals good movies, and focus on using those ingredients to create a new set of good movies that happen to take place in the same universe but about 19 years earlier with a couple of the same characters.

So to boil it down to its most basic:

I'd seek to create a series of space adventures in which Anakin is trained by Kenobi, falls in love and gets someone pregnant unbeknownst to him, falls to the Dark Side, and helps hunt down and exterminate the Jedi.

This would all be in the climate of the beginning of the Empire and the fall of the Republic. But I'd remember that the politics should be the environment rather than the story itself. It could provide macguffins to drive plots, but shouldn't bog the series down.

I'd look to Kurosawa's Samurai films and a variety of other martial arts films, Westerns, and the legends of Arthur and the Knights of the Round Table for inspiration.

I'd consider perhaps that there is too much subject material for three films, and choose to omit things, or to change the number of films and drop the episode numbers.