Snow White and the Seven Dwarfs: The jealous Queen, who up 'til now has been fine with leaving her stepdaughter alive but in poverty, declares now is the time to settle their rivalry for once and for all.
Grimhilde: And there, my faithful huntsman, you will KILL HER!
Pinocchio: The Coachman who runs the lawless carnival Pinocchio is tempted into entering, reveals his true intentions for luring in children: turning them into donkeys to become his slaves.
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.
Frollo has one delivered to him, and it's the only time in the movie, and his life that he's shown to realize he had done wrong, and a great wrong at that.(He had accidentally, but remorselessly killed Quasimodo's mother and then attempted to drown him.)
Arch-deacon: You can lie to yourself and your minions, you can claim that you haven't a qualm, but you cannot run from or hide what you have done from the eyes... The very eyes of Notre Dame!
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.
Tarzan: When Clayton reveals he wanted to find the gorillas so he can hunt and capture them.
Yzma: And do you want to know something else? I've never liked your spinach puffs! NEVER! [Played for Laughs of course.]
Treasure Planet: The robot B.E.N. is the last remaining member of the infamous pirate Captain Flint, but can't say much about where the treasure is due to having had his primary memory chip removed. Just after the the treasure is discovered, Jim finds and returns B.E.N.'s memory chip, causing him to remember why Flint stole it.
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.
Ralph is told that his friend Vanellope must be kept from racing because she's a glitch who could cause the game to be disconnected. Ralph reluctantly agrees, until he sees Van featured on the art of the arcade machine, proof that she's not actually a glitch.
When Anna needs a kiss from her true love to heal her frozen heart, she asks her fiance Hans to kiss her. Hans is about to...then reveals he never really did love her, and only said it so he can marry into the throne.
Hans: Oh, Anna... If only there was someone out there who loved you.
And earlier, when Anna announces to Elsa that she and Hans are engaged, Elsa's reaction to this news becomes this, especially to die-hard Disney fans, as real-life advice kicks in.
Elsa: You can't marry a man you just met.
Big Hero 6: Hiro finds out that Professor Callahan was responsible for the fire that killed Tadashi, he gets so sick of Baymax's Thou Shalt Not Kill rule that he rips out his healthcare chip to turn him into a killing machine.
Hiro: Baymax, destroy.
Later, When the team shows Hiro security footage of Callahan to discover his motivation, and sees him hugging a woman who was testing Krei's transporter before it malfunctioned and was presumably lost forever.
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...
Po's father: My son is alive.
In The Man Called Flintstone Fred has been taken prisoner at the hideout of criminal mastermind the Green Goose. He manages to escape his prison cell and much to his relief happens to run into Triple X, an agent who is working with the organization that hired Fred. Unfortunately for Fred, he happens to discover a secret of Triple X's in the process:
Fred: Hey, that's funny Triple X. The Green Goose was wearing a mask like this!
Triple X: He was? What a very clever disguise, don't you think? Now may I have it back, please?
Worker: We all have something that makes us something, and Emmet is... nothing.
The Dragon with a split personality, Bad Cop/Good Cop, is forced to have his good side literally erased, turning him into a permanently ruthless policeman who's even willing to Krazy-Glue-freeze his own parents.
After being mortally wounded, the Blind Seer Vitruvius makes a confession to Emmet, who he claimed to be The Chosen One.
Vitruvius: The prophecy... I made it up. It's not true.
Emmet: But that means... I'm just an ordinary guy?
The third act reveal, that the whole LEGO universe has really been a metaphorical story being imagined by a kid with a frosty relationship with his father.
The Man Upstairs: This is Dad's stuff. Everything that you see here is your father's. And everything is thought out. [...] Finn, we're going to play a game. It's called: "let's put everything back the way it was." So I can make things the way they're supposed to be, permanently.