Assuming the posted vid is legit, I kinda dig the ‘ponies across the generations meet’s plot.
And that’s about it. Everything else looks banal. Also the fact that the characters look like they’ve had their personalities and relationships reset is weak. I don’t want S1 Twilight having to re-befriend the Mane 6, I want S9 Twilight making new friends. I especially want to see Sunny meet Twilight, but whoops A) this isn’t the Twilight that Sunny grew up reading about and B) Sunny might not be the Sunny we’ve come to know, so we also lose out on the prospect of Princess Twilight mentoring Sunny on being an alicorn.
The Mean Girls-esque villain is lame. I know we can’t exactly have Chrysalis or Sombra without them being remade from the ground up, but still lame to have them replaced. Opaline could’ve filled the role, but then we arrive again at the previous problem of it not being the same Opaline causing problems to the same Twilight and Sunny.