Check out the trailer for Upside Down. It looks to have a Romeo and Juliet plot yet set against a great Sci-Fi background.
The Plot: A man searches (Jim Sturgess) the forbidden twin world that fills the sky above him for the long-lost love (Kirsten Dunst) from his youth.
Upside Down features Jim Sturgess (Across the Universe), Kirsten Dunst (Spider-Man Trilogy) and directed by Juan Diego Solanas (The Man Without a Head)
Upside Down has a limited release date of Mach 15th, 2013.