Josh Bomb's splendid list of spoilers...
Jesus dies but then lives again.
Norman had his dead mother in his basement.
Private Ryan lives.
Dorothy makes it back to Kansas.
ET makes it home.
Marty makes it back to 1985.
Indiana Jones finds the Ark. And the Holy Grail.
The Von Trapp family escapes to Switzerland.
The Planet of the Apes is just Earth many years later.
The Cleveland Indians suck at first but then they win in the end... twice.
Charlie wins the chocolate factory.
Rocky wins. Then loses. Then wins. Then Apollo dies and Rocky goes to Russia and wins again. Then he becomes an arm wrestling truck driver. Or something like that.
Rudy gets to play.
Frodo destroys the ring.
They find Nemo.
They shoot Old Yeller.
Darth Vader is Luke's father.
Verbal Kint is Keyser Söze.
Neo is the one.
Soylent Green is people.
Rosebud was a sled.