Much like the Gen 7 Pokemon starters leaked month before they were announced (in an almost identical way), people have discovered three series of sketches that are rumoured to be the upcoming Gen 8 Pokemon starters.
In terms of design, they actually look quite good with the Grass Starter Pokemon resembling a lemur, the Fire Starter Pokemon resembling a rabbit and believe it or not, the Water Starter resembling a Platypus.
It’s quite possible that these aren’t real, but they look pretty damn good.