An astrophysicist embarks on secret mission to create a new planet, hoping to end a global war before an enemy tribe turns his people against their own.

Third attempt, more focused on the core story:

When a young, self-centered astrophysicist is entrusted with the fate of his people, he risks his life to find them a new home before an invading army lays waste to their dying planet.

>> early drafts of Star Wars are a sprawling mess... if you haven't read them I'd strongly recommend it--they seem way too focused on the sci-fi elements as opposed the final film's story,

Yep. Second the emotion. Well, worth studying.

And Pixar's motto: the story comes first. Only after the story is worked out do they do they apply the CGI eye candy.

>> early drafts of Star Wars are a sprawling mess... if you haven't read them I'd strongly recommend it--they seem way too focused on the sci-fi elements as opposed the final film's story,

Yep. Second the emotion. Well, worth studying.

And Pixar's motto: the story comes first. Only after the story is worked out do they do they apply the CGI eye candy.