One can write a compelling story but in Star Wars - in any movie - the visuals are equally important. From the ships, clothing, to alien characters, it all qualitatively impacts the story. I am wondering, how do you envision it all and how will it impact the telling of your story? Borrowing from xhonzi's excellent question format:

The characters

How do Jedi dress?

How will your main characters dress?

Will you have an alien main character?

(This question is a big impetus in my making this thread. Star Wars was great because it had droids and a Wookiee as main characters. If the PT is only humans running around it seems lacking in such a diverse universe.)

If you have an alien character, what does it look like?

This is more story-related, but how do you resolve the fate of an alien main character with its non-mention/appearance in the OT?

Will you have droid main characters?

If so, what droids?

Machines

What inspires your vision of ships?

What will droids look like?

The Setting

What sort of planets?

What inspires your vision of architecture?

Overall feel

Color grading? Anything as radical as "O Brother, Where Art Thou?"

Any other thoughts on how your prequels would look!