>>220556Here's what I would have done.
An ancient evil appears, and it's the ancientest evil ever. Celestia has been planning for this for centuries or more, but it's coming out early. Celestia goes after it alone and dies trying to stop it because Twilight isn't ready, Luna gets sad because her sister's dead/a statue that got shattered by the evil, Twilight and pals try their "Magic of friendship" beam and-
Oh shit it didn't work
Oh shit he says he's too evil for good things like harmony to affect him
OH SHIT THE MONSTER JUST RIPPED THE ELEMENTS OF HARMONY OUT OF THE HEROES
DISCORDING 2: ELECTRIC FUCKMETOO
Oh shit the monster's ruling everything now
Oh shit things have never been darker
Luna sacrifices herself fighting the evil and trying to help the heroes get away
She's the only reason why the mane six aren't statue'd right there
Life is suffering now
The sky is red now
Mane Six is forced to take on fake identities and live under the evil's nose
But truly loving your friends and being good even in the worst time makes life worth living, and the elements of harmony the heroes didn't represent before but do now (Everyone swapped since they're magically stopped from doing their own virtue but not each other's) and the heroes fight the evil and all six become alicorns, and they try a kung fu fight but it doesn't work, then the heroes pour all their magic into Twilight while believing in her super hard, memories of all the good times flash before her eyes as she starts glowing, and she becomes a Celestia Alicorn with big size and starry mane and starry eyes (SYMBOLISM!) and Super Sayian Alicorn Twilight, conceputal master of magic as a concept, defeats the evil by kicking its ass for a while then making a galaxy-sized black hole and blasting the monster into it.
And rainbow lasers clean up the world...
Well, they clean up the red doom sky. Rebuilding towns and making a new playset will take a while. But Twilight's shocked when they all fly down and return to normal but Twilight still has wings.
RD: Well, if anypony ever earned them, Twilight just did!
Then there's an afterparty just like the party Twilight had in episode one. Shot for shot remake it. She hated it before, but she loves it now.
She loves these ponies now.
Still, Twilight goes upstairs onto her bed to stare up at the stars.
Celestia, looking down from the sky with Luna in the form of stars, smiles at Twilight.
Twilight smiles up, then her friends show up and they have a nice conversation about deep shit
RD: And if any bad guy shows up again, we'll kick its butt!
Spike: And at least we'll always have Celestia and Luna toys!
Then Twilight has an idea and summons Celestia and Twilight as spirits, puts them in Spike's action figures (the ones shown off earlier in the episode) and tiny toy Celestia and Luna possess the toys, make real bodies, possess those, then go back to ruling Equestria while Twilight goes back to enjoying life and friendship in Ponyville.
Episode irises out.
Pinkie interrupts to thank everypony for being such a great friend.
Screen goes black
Then Faust's "I invite people to watch my show, if I've done my job well they'll like it" quote appears on screen, then the credits roll movie-style and interspersed with the credits is the biggest (money-wise) charity shit the fandom's ever done.