Change the opening crawls so that they’re all inconclusive.
"It might be a period of civil war… Rebel spaceships, that could be striking from a hidden base, probably won their first victory against the evil Galactic Empire… or second.
During the battle, Rebel spies probably managed to steal secret plans to the Empire’s ultimate weapon, the DEATH STAR, and space station with theoretically enough power to destroy a planet.
Likely pursued by the Empire’s kind of sinister agents, Princess Leia could race home aboard her starship, likely custodian of the stolen plans that can presumably save her people and restore freedom to the galaxy. In theory."