WIth the surprise reviews of the new Bumblebee Movie(Currently standing at 97% on Rotten Tomatoes), I actually thought about a Princess Celestia Live Action movie focused on the Princess of the Sun.  But unlike the source material, this is less saccharine and more serious.

The movie title will be called Celestia.  The characters are....

Princess Celestia(Ideal actor: Nicole Oliver)

Princess Luna(Ideal Actor: Tabitha St Germain)

Queen Chrysalis(Ideal Actor: Kathleen Barr)

Thorax(Ideal Actor: Kyle Rideout)

Pharynx(Ideal Actor: Bill Newton)

Megan Williams(No idea on who should play her)

Jack Williams(Ideal Actor: Hugh Jackman)

Optimus Prime(Ideal Actor: Peter Cullen)

The story starts out in Equestria.  Princess Celestia is running away from a Changeling invasion by the request of her sister Princess Luna.  She is badly injured from the attacks by the Changeling Hive.  Deep within the forest, Celestia discovers a cavern that contains a mysterious portal.  Without a second thought, she jumps on in, hoping to evade her pursuers.

She appears on Planet Earth, still as the Alicorn she started out as.  But her injuries have left her tired.  She struggles to get forward and decides to rest for a bit, hoping to heal up her wounds.  As she did, she met a human girl named Megan Williams.  Megan realized that Celestia was sentient like her, but was also badly hurt.  She helped Celestia get up and took her to her home, allowing her to rest in a nearby barn.

Her father is Jack Williams, a veterinarian who also owns an Animal Sanctuary, looking after those who need it.  He barely talks with his daughter, and sometimes snaps at her in anger.  Despite his problems, he is not a bad man, nor does he even drink booze.  One day, Jack discovers Megan tending to Celestia.  At first, Jack was upset over Megan hiding this from him.  But his concern was more towards Celestia's well-being than to scolding his daughter.  With a little help, Jack was able to patch up Celestia and allow her to rest in his barn.  Though he criticized his daughter for not telling him about Celestia's presence, he began to understand why she kept her from him.  

For a month, Jack and Megan looked after Celestia in hopes of nursing the Princess in exile back to full health.  It is discovered that long ago, Jack once had a wife named Amanda Williams(Who would be played by Nicole Oliver).  Months ago, Jack lost his wife to cancer, and despite making a promise to look after Megan, the loss of Amanda left Jack a broken man.  Through helping take care of Celestia for Megan, Jack admits that Celestia reminds him of his late wife.

BAck in Equestria, Queen Chrysalis has managed to take over the kingdom.  But she is upset that she doesn't have Princess Celestia or Princess Luna as her captive.  When Thorax makes a suggestion to Chrysalis, the Changeling Queen grabs him by the tail and tosses him aside.  Later on, Thorax and his brother Pharynx discover a portal in the same area that Celestia disappeared into.  Thorax reported the findings to Chrysalis, only for the queen to instead commend his brother for the action and to simply ignore Thorax.

Back on Earth, Jack and Megan show Celestia the Animal Sanctuary that they and the late Amanda built.  Its purpose was to allow animals who were harmed by man's own devices to have a place to call home.  It is there that Jack looks after them with help from Megan.  He also admits that some humans eat meat in addition to vegetables that equines like Celestia eats.  But Jack and Megan are vegetarians.  They invite Celestia inside and allow them to have a meal together.  It looked like Celestia was finding a new lease on life.

But one night, Celestia had a nightmare of seeing her people being tormented by Chrysalis.  So the next morning, Celestia told Jack and Megan that she had to do a little soul searching and took off.  Jack wished her the best of luck before going back to look after the animals with Megan.

Celestia found a spot nearby to reflect on the events that transpired.  As she did, she would meet up with another strange from another world: Optimus Prime, Leader of the Autobots.  The two would share a chat together on their own conflicts.  Celestia has to deal with the confrontation of saving her people from Chrysalis, while Optimus still has to help protect his Autobots from the Decepticons.  The two realize they may have more in common than they realize.

At Jack's house, Jack and Megan are confronted by agents of Sector 7, demanding the whereabouts of a rogue horse with wings.  Jack tried to deny any wrong doings.  But he realized that these aren't Sector 7 agents.   They're changelings, and Queen Chrysalis is leading the group.  Chrysalis orders her hive to tie up the father/daughter duo and use them for bait to lure out Celestia.

At the same time, Celestia began to detect Chrysalis' presence and knew the Williams were in trouble.  Optimus encouraged Celestia to go rescue them, and mentions that this is her fight.  Celestia thanks Optimus and takes off for the Williams home.

Back at the home, Chrysalis berates Thorax again, tossing him at Jack Williams and mentions how worthless he is regardless of his loyalty.  This makes Pharynx question his loyalty to Chrysalis.  But as the Changeling Queen mentions that no one will be able to save Jack or Megan, Celestia shows up just in time.  She uses her magic to free Jack and Megan from their bonds.  

Chrysalis fights Celestia, hoping to use her as a means of causing all of Equestria to submit to her.  Jack and Megan fend off the Changeling swarm.  But to their surprise, Thorax and Pharynx takes sides with them and turn against their own brothers and sisters.  Phyarynx cares more about his brother Thorax than his Queen.  Thorax, burnt out by Queen Chrysalis' ultimate disapproval of him, decided to join his brother.

The fight is taken outside where Celestia, Jack, Megan, Thorax and Pharynx battle Chrysalis and her hive.  But during the fight, Chrysalis creates a cloud of black smoke to surround everyone, and target Jack Williams.  Disguised as Jack's late wife Amanda, Chrysalis attempts to seduce Jack and take advantage of him missing his wife.  Jack was tempted at first.  But the choice of words by Chrysalis allowed Jack to snap out of it and finally put his past behind him.  Chrysalis changes back and attacks Jack, only to be countered by Celestia.  The Princess of the Sun held nothing back in fighting Chrysalis, with the rest of the hive knocked out of comission.  Jack, Megan, Thorax and  Pharynx would also help Celestia beat back Chrysalis.

As Chrysalis was on the verge of losing and began to resort to dirty tricks, Princess Luna shows up out of nowhere, having followed Chrysalis to Earth.  Chrysalis recognizes Luna and begins to attack, only for the Princess of the Night to transform into Nightmare Moon  She uses a Nightmare attack to break Chrysalis' spirit and leave her in complete fear, thus ending her rule in Equestria.  

Celestia was glad to reunite with her own sister Luna.  Luna admits that had something bad happened to her big sister, she would have went mad, and no force in Equestria or Earth would be able to stop.  The two would share a bond together with Jack sharing a bond with Megan, and Thorax with Pharynx.

Later that day, Jack and Megan said good-bye to Celestia and Luna as they departed with the captured Chrysalis and her Changeling hive.  Celestia promises that Jack and Megan will be welcomed in Equestria.  But despite getting a pardon from Celestia, Thorax and Pharynx chose to stay behind, fearing that no pony in Equestria would appreciate a Changeling in their midst.  Jack and Megan hired them to help out with the Animal Sanctuary.  They even take up human forms to fit in. 

Celestia and Luna return home to Equestria, hailed as heroes for stopping Chrysalis.  Though Celestia admits....she does miss her time on Earth, and hopes to return there again one day.

The story ends with Optimus Prime narrating the new lease on life that Jack and Megan are now going through, and wishes them a bright future.