The ruling Queens of a world called Rootbase, come to Princess Twilight's castle via a metal portal or gate. They seek her aid as her world is peaceful and free, unlike theirs and they wish their pupil to learn from that to build a better future.
I thought up this story idea while looking at some concept art for what someone thought Generation 5's main cast would look like. Their personalities aren't like the artist envisioned but they are different. I plan on making this a full story so let me know if you like what I put out but bear in mind that there is more to come.