Aladdin: Jafar spends years hunting for the lamp with the power to grant wishes. He then betrays Aladdin after having him retrieve the lamp for him, only to discover a bit later that the lamp fell into the chasm with Aladdin.
Later, Aladdin goads Jafar into turning himself into a genie, knowing the sorcerer hungers for more power. Jafar takes the bait and wishes to become an all-powerful genie. It looks things have only gotten worse, and everyone else asks Aladdin how he could make such a mistake, except genies are slaves. Jafar is now all-powerful, but is trapped in a lamp to obey a master.
Frollo: I should have known you would risk your life to save that Gypsy witch, just as your own mother died trying to save you.
Frollo: Burn it.
Hercules: Hades is told by the Fates that he will conquer the heavens, release the Titans, and overthrow Zeus on the day the planets align, on one condition.
Fates: Should Hercules fight, you will fail.
Mulan: More like a wham silence at the end of "A Girl Worth Fighting For". Everyone's happily singing about that certain girl that's waiting for them at home (or not!) and then... wham. Pillaged village.
Tarzan: When Clayton reveals he wanted to fiund the gorillas so he can hunt and capture them.
B.E.N.: ...right up until Flint pulled out my memory circuits so that I couldn't tell anyone about his BOOBY TRAP! (explosion)Speaking of which...
Brother Bear: Kenai is a human who was turned into a bear by the spirits to replace the one he killed. Making the journey back with a cub named Koda, he eventually listens to Koda's story that the cub has been hyping for past several miles. Once Koda gets to this line, Kenai realizes the bear he killed was Koda's mother.
Koda: And now there's nowhere for mom to go. The monster has her backed up against this giant glacier!
Meet the Robinsons: Lewis discovers that Bowler Hat Guy is his roommate at the orphanage, now grown up.
Owl: Our dear friend Christopher Robin has been captured by a creature called the Backson!
Wreck-It Ralph: Ralph is told that his friend Vanellope must be kept from racing because she's a glitch who could bring bad publicity to the game. Ralph reluctantly agrees, until he sees Van featured on the art of the arcade machine, proof that she's not actually a glitch.
The line that finalizes The Reveal. King Candy of Sugar Rush turns out to be Turbo, an assumed dead racer who caused the shutdown of two games in a bid for glory.
Turbo]]: I'm Turbo, the greatest racer ever!
Frozen: When Anna needs a kiss from her true love to heal her frozen heart, she asks Hans to kiss her. Hans is about to...then reveals he never really did love her and only said so he can marry into the throne.
Hans: Oh, Anna... If only there was someone out there who loved you.
Kung Fu Panda 2: Po spends most of the film wondering what happened to his biological parents until he eventually finds out that he's the Last of His Kind. At the end of the film though, we cut away to an unknown location and...