I'm not sure if I'm late to the game with this one (I went back to where the leak was discovered in the thread to catch up) but as someone who works in video, I think comparisons like this are worth examining to compare how the video compression of snapchat itself or the photo compression of the screenshot would have affected the image.
For example, you see in the leaked empty-battlefield that the whites are much more like solid shapes than gradients, and that the darks are muddier. I think that could actually explain some of the weird shapes. When video/photo compression tries to make an image smaller than it is, it has to turn several pixels into one pixel. The way it does this is determined by an algorithm, and if this is real, it looks like snapchat's in this case is inclined to prioritize high contrast even if it obscures the shape somewhat. I think this would explain some of the complaints with snake and olimar's shadows. the shadows in those cases may not have been a dark enough shape, and so the photo compression would have prioritized the bright battlefield stage ground over the low-contrast shadows. This is also consistent with puff's weird eyes, because the bright white circles, again, turn into weird shapes just because the video compression itself favors light colors over mid-range tones.
However, although I want to believe this is real, this itself doesn't necessarily mean it's real so much as it would mean that it definitely was a snapchat. It does mean that I don't think puff's eyes or missing shadows or other slight distortions are grounds for disproving it, though.
papagenos ' source, they have actual proof of Banjo, so that would be another company they'd need to add (obviously depending on whether or not you trust this source.)
