Well the new teaser just went out and looking at the mask it now makes it clear that fortnite is taking reference images from cultural masks to make ingame skins, like the
Fox Clan Mask Fortnite, HD wallpaper | Peakpx
Drift (outfit) - Fortnite Wiki
3D Printed Fortnite Drift Mask Special Kitsune Cosplay STL File by 3DprintmodelStore | Pinshape