Richard III and Scar

If Richard III was an animated film character, he would be Scar.

Now, I don't know what the real Richard III was like. Here, I'm just talking about Richard III from Shakespeare's play by the same name.

Scar is a character in the Disney animated feature, The Lion King.

List of similarities:
1. Want the throne.
2. Want the death of their nephews and arrange for their deaths to take place. Richard succeeds; Scar fails.
3. Crafty, silver tongued. Scar weaves a web of lies around Simba. Richard III convinces a woman who whose husband's death he caused to marry him. And that is just one specific example for each...
4. Richard III was a hunchback and walked with a limp. Scar is a runt, he's scrawny and can't even grow a full mane while his brother the king is large, strong, beautiful, and brawny. Scar says, "Well as far as brains go, I've got the lion's share, but when it comes to brute strength, I'm afraid I'm at the shallow end of the gene pool."
5. Both are defeated in the end after a battle.

Simba and Uncle Scar

Horses Weeping For Their Masters

In three stories, two ancient and one not so much, the horses were aware that their masters were soon to meet their ends.

In Shakespeare's Play, Julius Caesar, The horses belonging to Caesar wept because they knew his death was drawing nigh.  This was a sign, along with many others that foretold Caesar's death in the Senate.

Achilles' horse Xanthus, foretold Achilles' death.  Xanthus was not a normal horse, he was an immortal horse and he spoke aloud.

The Gray of Macha

Cu Chulainn's horse, the Gray of Macha, knew his master would die if he rode out to battle that day and refused to be hitched to the chariot until Cu Chulainn came and spoke to him. The Gray submitted in tears of blood:  "Cu Chulainn went to him. And thrice did the horse turn his left side to his master....Then Cu Chulainn reproached his horse, saying that he was not wont to deal thus with his master.
Thereat the Gray of Macha came and let his big round tears of blood fall on Cu Chulainn's feet. And then Cu Chulainn leaped into the chariot, and drove it suddenly southwards along the Road of Midluachar."  (An Anthology of Irish Literature, vol. I, by David Greene)
In this case, I'm not sure if the Gray was foretelling the future, he may have just been aware of the circumstances.  Other events foretold the death of Cu Chulainn, and the Gray could have been privy to some of them.

But why horses? I have several ideas, which are merely speculations:
Perhaps because they are man's "second" best friend.  Like dogs, horses are man's companion more so than most other creatures. People bond with their dogs and horses, and this bond is celebrated in many stories.
Mythology about Cu Chulainn, and Greek mythology are steeped in omens and prophecies, so why not have the horses involved?  
Additionally, animals have a keen sense of the approach of danger. Their senses are much keener then ours. A dog knows when someone is approaching before a person does. They also can supposedly sense when someone is good or bad. People can sometimes tell too.  Nothing really has to happen, but certain people make us uncomfortable: it's either women's intuition (if you're a gal) or else a fine reading of body language, tone, and the eyes.  There are also stories from WWII were the fighter pilots knew who wasn't coming back just before a flight. If people and animals have such keen senses, then why not exaggerate in a story and make the horses cry or talk? Mayhap these legends were born from an exaggeration of the amazing abilities of animals coupled with the horse's tendency to freak at things they perceive as threats.

Brave - Transformations to Transform Fate

Brave has a rather unusual plot line -for a movie.

The story that most reminds me of this plot line appears, interestingly enough, in The Little House on the Highland series. These are stories about Laura Ingalls Wilder's great-grandmother, Martha, who grew up in Scotland. In a tale that little Martha supposedly heard as a child, a girl is supposed to marry a man she doesn't love at the order of her father. She runs off to the church in despair and overhears two mice talking about her.  One says to the other that what she really needs is such and such a fix. She takes their words to heart and performs the spell, then she goes home to bed. The next morning, her wedding day, the detested suitor arrives. She appears, to the surprise of all, with the head of dog. The suitor begins to rail at her father for cheating him and says he won't have her. Meanwhile the man she loves arrives and he takes her in his arms despite her dog's head. Her head turns back to normal and she weds the man she loves and who truly loves her.

Like Brave, the spell worked an unexpected animal transformation but in the end, the desired outcome arrives. It just arrives in a way no one thought it would, via their reactions to the transformation. 

Picture from Karen's Whimsey