Gen 9 will be just one pony and every other pony in the cast is just a figment of her imagination.
I think the G5 movie will handle its 5 main characters just fine because we are meeting these characters along the way. In the 2017 movie, FiM had us “meeting” and following all of the Mane 6 from the beginning to the end, with even more groups of characters to meet on top of that. It felt clunky and people who were new to the series were confused.
[character]'s G5 personality is wrong because it wasn't like what it was in G4 even though it's not the same universe" complaints. I've heard them about Rainbow Dash from G3. As if G3's writers were time travelers. And then there are complaints about characters in Pony Life for similar reasons.
Derpibooru costs over $25 a day to operate - help support us financially!