Crazy Idea I might have.

Okay, hear me out, I'm bad at making summaries and this isn't all that fleshed out yet. I was thinking of making a conversion bureau fimfiction, with the ponies already conquering almost 90% of the earth. Xenolestia is no the throne to making a galactic pony peace society. The humans have lost the war and they made the converted humans and ponies pay for every inch they took.
Now before all this has happened, when the portal that led to Equestria appeared, the humans were, of course, fascinated by the ponies and it's society, especially magic since that always made humans excited. Anyway's it starts as most conversions bureau starts(I hope), bureaus pop up first by volunteering to become pony in a "safe" and " controllable" way, then months later someone notices the creepy way the converted humans always sing praise to Princess Celestia, then scientist discovered that effects it has on the converted humans, after that the world leaders demand on why they did such a thing and then Xenolestia comes out proclaiming how humanity is a blight to her peace and as such must be eliminated. Then she activates the barrier and the race against time to save humanity starts. Months later, failure after failure to stop or slow down the barrier, the will of humanity is starting to wilt down piece by piece. Until one day some crazy scientist in a high enough position suggested that if the Unicorns can perform magic outside of their reality then what is stoping humans from doing the same thing. So to shorten it humans hunt down unicorns, find out how thier magic works, then try to replicate it, but this time instead of using science, they use the occult. Basically, the humans find everything they can about magic on their reality/planet. After seeing that they can't do magic, they will use the external source, which is the portal/barrier and tries to deliberately open a portal to another world, instead of just it popping in the middle of the Pacific. They tried to summon some sort of portal to either escape to, but instead of that they accidentally summoned Papa Bones( For those who don't know, you can search(Overlord(オーバーロード Ōbārōdo) and find out all about the glory of Nazarick). The story will mostly revolve around Earth humans, then the servants of Nazarick.
Anyway thanks for reading all this and reaching the end. For that, I give you a digital cookie.