Xeogran
Marshadow Fan
oh there has been update to this on Paul Ryan's(Webmaster and Media manger of Pokeshopper) Twitter and it turns out the mystery figure in this image is actually just a Pikachu with an Eevee, and no, this is no joke this is real: https://twitter.com/PokeshopperVGC/status/1030919017081397248
Thanks for the info.
At this point, Mewthree is more likely than a new Eevee form.
Inb4Mewzero