Here is part 2 of my Season 9 Ideas (Plus some ideas that i came up with for part 1):
WARNING: Contains head-canons! This is NOT canon to the show!
Episode 8(203): The Magician's Apprentice: Trixie and Starlight head to Las Pegasus! While there, Trixie meets an elderly magician and helps him with his act. Unfortunately, a revelation regarding her new friend arises, and a rift is formed between Trixie and Starlight! (Note: The magician that Trixie helps in this episode is the unicorn Jackpot, who would be the antagonist, as well as being revealed to be Trixie's long-lost father!)
Episode 10(205): Call of the Void: In this villain-focused episode, Cozy Glow and Tirek travel to the Hollow Shades in search of a powerful relic. Meanwhile, Lord Grogar pays a visit to an old ally. (Note: The powerful relic that Cozy and Tirek are looking for is the Alicorn Amulet, having been buried near it's origin; the Well of Shade. There would be a passing remark about the Pony of Shadows, with both villains wondering who, or what, the darkness that corrupted Stygian could have truly been. Meanwhile Grogar visits the grave of one of his followers, a donkey named Bray (based off of his G1 counterpart). Using the Alicorn Amulet, Grogar revives Bray as a windigo-like figure, and the episode ends.)
Episode 11(206): The Friend-Ship: The Student 6 go on a cruise!
Episode 12(207): Rarity's Ridiculous Roadtrip: Rarity is going to Manehatten to attend Fashion Week! Unfortunately, the ride there is riddled with obstacles! (Note: This episode would feature the return of Pistachio, who would be a main character in the episode.)
Episode 13(208): The Changeling War Part 1: (Ex-)Queen Chrysalis has returned! With an army of newly grown changelings, she attacks the Changeling Kingdom! Civil War has broken out! It is up to Twilight and company to stop her! This episode would start in the Changeling Empire, where Thorax would be attacked by one of his guards! After beating the foe, it would be revealed that the guard was a rouge changeling in disguise. From the shadows, Chrysalis would engage her plan. The entire empire would be swarmed by rouge changelings! Twi and company get word of this, and do their best to stop her. They are captured by the end of the episode after it is revealed that the Thorax that had been helping them during the entire episode was a rouge changeling in disguise! Spike, Starlight, and the real Thorax manage to escape.
Episode 14(209): The Changeling War Part 2: Spike, Starlight, and Thorax have escaped Chrysalis' minions! Now, trapped in the Changeling Kingdom, they must find a way to overthrow the bug queen once and for all! Starlight and Company navigate the Changeling Kingdom during most of the episode, with them freeing Thorax's subjects from imprisonment. Near the midway point, Chrysalis's plan is revealed. She intends on using a machine to drain the love, and also the life, of her victims! (Note: The machine kinda looks like the one from the Rainbow Factory fanfic!) Eventually, after a climactic duel between Starlight and Chrysalis, the ground they are standing on collapses, and Chrysalis falls towards her machine. Either Starlight saves her, and she is reformed, OR Chrysalis is impaled by her device off-screen, and dies a brutal, albeit G-rated, death. (For the sake of convenience, i'll just kill her off in my version.)
Episode 15(210): Starswirl's Descendant: Starswirl pays a visit to Ponyville! While there, he encounters a surprise relative of his. Chaos ensues. (Note: In this episode, it is revealed that Discord, the lord of chaos, was accidentally created by Starswirl, which would technically make Discord the non-biological son of Starswirl! It would also be revealed that Stygian is Starswirl's great-nephew. The episode would also have a small reference to the 'Discord is Starswirl' theory.)
I'll post the rest later