Did anyone notice the new AT wiki??

I looked up Adventure Time wiki in the wiki searchbox, and right under this wiki was another AT wiki. I clicked on it and saw under reccent wiki activity that there was some page called Slena the vampire princess or something, and it was a page about Marcaline's older sister who is in love with Finn and has kissed him on the mouth, so I think it might have something to do with some kind of fanfiction maybe??