Star Wars Episode IV: A New Hope
From Disney's Hollywood Studios Wiki
Star Wars Episode IV: A New Hope, or simply Star Wars as it was called when it came out, which came out May 25th 1977, is the first Star Wars film to come out, and the fourth (Fifth including Star Wars: The Clone Wars) chronologically.
This list is just that of the references directly to A New Hope. For a complete list of references, see Star Wars
The video montage on the Great Movie Ride currently has several scenes from this film, including jumping to Lightspeed at the very end right when you start moving again.
A car based off of Luke Skywalker's Sandspeeder, along with Meet and Greet versions of Luke, Princess Leia Organa, and R2-D2, where all featured in Disney's Stars and Motor Cars Parade.
Episode IV Verions of Jawas, Princess Leia, Luke Skywalker, R2-D2, Stormtroopers, and Tusken Raiders (Formerly, Han Solo and C-3PO also appeared) are all Meet and Greet characters during Star Wars Weekends.
This film starts off with a group of Storm Troopers, led by Darth Vader, attack a seemingly peaceful ship to capture Princess Leia Organa, whom he believes stole plans to the Empire's ultimate weapon, the Death Star, which the princess has hidden within R2-D2. However, R2-D2 and his counterpart C-3PO had already fled the epic spacebattle and landed on Tatooine, where they are captured by Jawas, and sold to Owen Lars and his nephew Luke Skywalker.
While Skywalker is cleaning the droid, he finds part of a message from Princess Leia Organa, hidden within R2's memory, for an Obi-Wan Kenobi, who Luke thinks may be the old hermit Ben Kenobi. R2 runs out over the night to find Kenobi, and when Luke realizes this, he and 3PO search out to find them. When they do they are attacked by Sandpeople, but are saved by Obi-Wan/Ben Kenobi. Master Kenobi than finds the full message in R2's memory bank, explaining that the plans are in there, and that he is their only hope to get them to the secret Rebel base. Upon finding this, he tells Luke that he was a Jedi Knight, who worked with his father. However, Ben tells Luke that Darth Vader murdered and killed his father, making it appear as though they were different people. Ben asks Luke to join him on his mission to save the Princess and bring the plan to the Rebels, to which Luke said no to, until he discovered that his family had been killed by the Empire while he was gone. The two go into Mos Eisley and meet Han Solo and Chewbacca, who were fleeing a negative financial interaction with gangster Jabba the Hutt, which made it easy to convince them to fly Luke and Ben to Alderaan.
However, upon arriving their they discover that the entire planet had been destroyed as a test of the Death Star's power. The Death Star was still in the area when they arrived and captured Han's ship, The Millennium Falcon. Luke and the others on the ship avoid being captured themselves, however, by hiding in secret compartment's on the Falcon. Luke and Han are able to steal some Storm Trooper outfits to sneak around the station and find a way to get off. Upon planning, they discover that the Princess is being held there, so they split up with Han and Luke going to save Leia, and Kenobi going to shut off the tractor beam. Han and Luke find her, and with a few blaster fights and surviving a trash compactor, are able to get her to the ship.
Obi-Wan, on the other hand, was able to shut off the tractor beam, but ran into his old friend and apprentice, Darth Vader, the first time they had seen each other since the incident on Mustafar. Obi-Wan, spotting the crew heading to the Falcon, sacrifices himself to buy time, as Luke watches in terror, then screams. Horrified and angered, Luke takes his final blasts at the stormtroopers and dashes onto the Millennium Falcon. Outside of the Station the blasting continued as Luke and Han had to destroy several Tie Fighters before being able to jump to Hyperspace to get to the secret Rebel Base on Yavin IV.
Upon arriving there, they read the plans on R2 and discover a small hole on the side of the station that, if hit exactly right, could explode the station, a hunch on which they plan a full scale attack with. Luke tries to convince Han to stay and fight, but he, seeming to only care about himself, says no. The battle begins, and many ships on both sides are destroyed. Luke gets near the hole but is almost destroyed by Darth Vader in a ship right behind him, when Han swoops in and gets Vader off his tail. Luke uses the Force to guide the torpedo into the hole, and flys off just before the station explodes, making Han and Luke heroes of the galaxy.
Chronologically, this film is preceded by Star Wars Episode III: Revenge of the Sith, and, both chronologically and in production order, it is proceeded by Star Wars Episode V: The Empire Strikes Back.