Just two hours ago, this Reddit thread revealed an apparent leak of the remaining Overwatch Anniversary Skins. 

According to the post, a member of a Taiwanese Overwatch fan group on Facebook posted these screenshots without explanation as to how they were able to see them. The screenshots include new skins and a Golden Loot box. An Imgur album was linked where the following images were provided:

Blizzard has yet to release an official post or Tweet of their own regarding the leaked skins. If it follows typical release patterns, a promotional video should be dropping soon.

While it is technically possible these are fake, the quality of the images and skins makes that extremely unlikely.