I like the movie, but it would be better if they change Spinel backstory. Here's my own story which would be a little different. Hope you like it.

Out in space lays a lonely space rock with a dome. Inside is a beautiful garden. Pink Diamond and Spinel both walked towards the Galaxy-Warp (Spinel doing fun flips). Spinel is jumping with joy around Pink as she looked at Spinel.

"Isn't great my Diamond!" Spinel cheerfully "Blue and Yellow finally giving you your own colony!"

"Yes… its great." Said Pink looking uneasy.

Spinel continue to jump until she landed on Pink back with her stretchy arms wrapped around her torso and arms. Spinel with a smile looked at Pink with eagerness.

"We'll have many friends to play! A planet bigger to play at! And we'll be together forever!"

Pink smiled but frowned a moment later. As Spinel let go as her eagerness making her turned into a spring bouncing around Pink "When are we going! When are we going! When…" Pink grabbed hold on Spinel as she looked at her with a small smile "Spinel… there's something I need to talk about."

"Oh goodie!" Spinel happily as Pink put her down as Pink keel down "What is it Pink? Is it a new game?"

"No… its-its something not easy for me to say." Said Pink as she begins to shed tears making Spinel confuse and worry.

"Spinel… you're…" Pink tearfully trying to say the right words which making Spinel very unease "You're not coming with me to Earth."

"W-What?" Spinel in shock when she heard Pink said those words "W-Why not?"

"It's complicated."

"But… But I don't understand why I can't go with you?!"

"As a Diamond is my duty to make sure everything goes well and just."

"And?"

"And… it means I won't have the time to play all the things we always do."

"So… does that mean you don't need me anymore?" Spinel begin to cry.

"Hey, hey. Don't cry on me." Pink softly spoke to Spinel as she wiped her tear away "Of course I need you, you're a Pink Court Gem. It means you're my responsibility."

Spinel looked at Pink as a bit of her tears went away "Really?" Ask Spinel as Pink hugged her with tears "Of course you silly. You may be made to be my 'best friend' but the time we had together… were the best times I ever had." This was enough for Spinel to cry as her stretchy arms wrapped around Pink with warm and lovely embraces.

As they apart from their hug Pink looked at Spinel with a warm smile "Once I'm done with my first colony, I'll come back for you. So, you could make even more friends."

"You promise?" Ask Spinel happily.

"I promise." Respond Pink.

With that Pink stood up, turned around towards the Galaxy-Warp. But she stopped and looked at Spinel one last time with a smile "If anything does happen to me, please don't lose that happy, fun-going, goofy self-Spinel." Spinel looked at her with a 'tch' sound "Don't worry about me my Diamond. I'll be here once you come back."

Pink turned her head around as tears fall from her eyes, the only words in her thought were "I hope I'll be back for you."

As Pink walked up the stairs to the Galaxy-Warp, she teleports away leaving Spinel alone. Spinel stood perfectly still as she looked at the Galaxy-Warp. That she… her Diamond will be back for her. So, they could be together at their first colony.

As years of lightyears past, weeks becomes months, months become years Spinel remained still. Hundred years went as the vegetation in the garden overgrown, Spinel whose always been smiling begins to fade. Thousands of years past more as the garden, which was once beautiful with life, now became lifeless and withered. Spinel whose no longer smile continue watching at the warp-pad as her feet became stuck on the ground and roots began to grow around her legs and ankles. Her outfit became dirty with stain and tears. Even her face is dirty, as her hair became a mess.

As Spinel continue watching after 6,000 years, at the corner of her eyes something shines. She turned her head towards it as a hologram from the communicator which hasn't been use for centuries begin to show someone she hasn't seen for years. It was none other than… White Diamond.

"Greets royal Gems-Kind! Today we podcast this as we celebrate the second year of Era 3! As all you know, that 6,000 years ago we suffer the lost of Pink Diamond when she was shattered during the Gem War on Earth… She was shattered by a Quartz Soldier named Rose Quartz!"

This news made Spinel widen her eyes in shock. Pink Diamond was shattered… her Diamond… gone. She couldn't believe it. Why did it happen? How did it happen? So, many questions filled her head. She doesn't want to believe that Pink is gone, she couldn't want to believe.

"However, it was all Pink Diamond doing! She faked her shatter and took the form as Rose Quartz, led a rebellion of Gems! Ever since then the Diamond Authority wasn't the same! She spent her days on Earth as their protector!"

This other piece of news also made gave a very disbelieve expression. Pink faked her shatter in order to protect the planet… the same planet she was distant to turned into her own colony. All of this is too much for Spinel to gather, her Diamond left Homeworld and made Earth her new home. But that isn't all of it yet.

"Sadly, our Pink now departed from us, she gave up her form to give birth a Hybrid-Earthling! Everyone please listened to the son of Pink Diamond, Steven Universe!"

The screen swifts quickly as light shines to reveal to a young boy who's in his teens as the 16-yr-old Steven looked at the camera. Steven smiled to the camera as gave a speech. Spinel looked at a strange boy, revealing to be Pink's son.

"How's it going everybody! I know you all might be thinking as a new Pink Diamond! But you don't have to put me on a throne! I already have a rightful place, and it's on Earth! It's a Beach House where I lived with my friends! Garnet, Amethyst, and Pearl!"

Spinel shock increase, that Pink son Steven mentions 'his friends' as if they're were 'Pinks friends'.

"As much as I love to dismantle the empire and save all of your planets!"

For the first time ever, Spinel tried to move her feet as they're stunk in the ground. Until she freed them from the ground.

"I can't wait get back home…"

Spinel ran towards the hologram as Steven about to finish his speech.

"…and spent some quality time with my friends!"

As the feed was cut and turned off as soon Spinel got to it, she fell to her knees. After everything she heard, about Pink, learned about Steven, Spinel begin to break down in tears. "Y-You…" As Spinel began to speak, her voice gets barely made it out "You said y-you'll b-be back for m-me… y-you promise!"

As some tears fall on the ground Spinel gripped her fist on the dirt and began to tremble. Not in shock, but in anger "Y-You promise that we can be together! And now you replace me with your 'other friends'!" As if all those years waiting for her to returned are nothing but lies. Her body starts to glow white as she takes another form. Her hearts-shape buns became long pigtails, her shoulder puffs pointed outward, her heart-shape gem flipped over downwards.

As the glow fainted Spinel takes on a new form. Her clothing consists of a dark magenta top, puffy hot pink sleeves, puffy magenta shorts, hot pink wrist-length gloves, white stockings and a pair of magenta knee-high boots. She also has three eyelines on her face. She opened her eyes to give an angry expression, she gripped both hands as she slammed her fists on the ground.

"Steven and his 'best friends' better watch out." Her angry expression switch to a menacing, sinister grin as she looked at the audience half her face shadowed leaving a pink glow "Because Spinel is coming to… PLAY A GAME!"

Hope you like this first chapter. It'll take some time to think for the other chapters. Leave me your thoughts. Peace out.