involving our entire solar system , Earth vs Mars vs Venus vs Jupiter etc.
Then it wouldn't be Star Wars.
Why? just replying "it wouldn't be Star Wars" is an ass answer , you have to explain why , or you just don't know what to say?
Because it wouldn't be set a long time ago in a galaxy, far far away. You know, the very first thing shown on screen when the franchise first started?
Hmm.... Venus is like super hot and Jupiter is gas.
mmm, Star Wars has already been to modern day planet Earth. So the link is already established within film canon...