The Tharks subsequently capture Dejah Thoris, Princess of Helium, a member of the humanoid red Martian race. The red Martians inhabit a loose network of city-states and control the desert planet's canals, along which its agriculture is concentrated. Carter rescues Dejah Thoris from the green men in a bid to return her to her people.
Subsequently Carter becomes embroiled in the political affairs of both the red and green men in his efforts to safeguard Dejah Thoris, eventually leading a horde of Tharks against the city-state of Zodanga, the historic enemy of Helium. Winning Dejah Thoris' hand, he becomes Prince of Helium, and the two live happily together for nine years. However, the sudden breakdown of the Atmosphere Factory that sustains the planet's waning air supply endangers all life on Barsoom. In a desperate attempt to save the planet's inhabitants, Carter uses a secret telepathic code to enter the factory, bringing an engineer who can restore functionality. Carter then succumbs to asphyxiation, only to awaken on Earth, left to wonder what has become of Barsoom.".
I have high hopes for the movie. Disney considered stopping production when they were having some budget issues, but it was too far along, so they kept it. I'm hoping it will be worth it! If you clicked on the link about, you saw the trailer. This is the test footage for the movie.