According to Twitter user ujiidow, Nintendo did a big goof: seems like they accidentally used uJiidow's unofficial render of Mario instead of a real one on the Super Nintendo World website that went live yesterday. What is this, Among Us?
Here are the two images, for reference, with the unofficial one on the left, and the real one on the right:
...Yeah, it's hard to tell, isn't it. They both look like Mario, after all.
Here's ujiidow's capture of the website, and what it looks like now:
(Update: the image is actually still there - it's used as a loading icon on the website. Here's what it looks like:)
Further investigation has uncovered the fact that the maker of the impostor Mario also goes by the handle coolest_luigi on Reddit, where they first posted the image. How very suspicious. We're not saying that this is the classic "younger brother gets jealous, sabotages sibling" plot, but we're not not saying that.
Of course, it's not the first time that Mario has looked a lot like someone else, right? We've all played Super Mario Sunshine, and we all know how that played out.