highly doubt any admin can just add whatever he wants to e shop without any supervision, stuff doesn't work like that nowadays, we are not in the 90s, not to mention by now epic games or nintendo would have said something on their social networks saying otherwise, they always negate when its not true.
Not if it's in negotiation.
And also stuff does work like that. Lots of temporary stuff can be found on sites. I remember when I was excited about Chrono Break because it was trademarked but it turned out Square was just being itself.
Nothing is official until it's official.