@Soctavia
I don’t think there’s been anything after the huge leak, but the idea seemed to be that, at the time of the leak or at the time that the leaked documents were written, the people working on G5 were fans of having Twilight as an earth pony, unconvinced by a pegasus Pinkie Pie and more ambivalent on a unicorn Fluttershy. Or something like that – it’s been a while since I read that stuff.
I do generally want to say – and this is only tangentially related to your post, but it’s something I’ve been thinking about and this seems like the right thread for it – that I don’t think the stuff we have about G5 is as hard and definite as it’s been treated. It’s mostly concept art and exploration, sort of the equivalent
of this stuff – material that sometimes was wildly different from the finished result. The leak was two years ahead of the planned release for G5, and hell, two years before the movie came out the Storm King looked like
this – a lot, including major things, can change over two years of work. It’s entirely possible for entire concepts or characters to be scrapped before release, or that major changes and introductions will be made between that blasted leak and 2020 – such things are not exactly rare in the process of constructing a new work, its story and its world and characters.