How is this fanart this good!?
Assuming this is a serious question and not just rhetorical - DC doesn't exactly have a hard style to emulate for a professional artist or even an art student. The animation industry the world over is predicated on the fact teams of people can draw the same thing, the same way. For those with the talent it's just a matter of time/desire.
What's funny is that image doesn't
have to be fan art. If DC was willing to hire artists, he could have had a lot more animation stockpiled in these last three years. Remember Western cartoons and Japanese anime TV is based on the fact it can be done quickly enough to put out 30 min shows every week. By comparison, this game has a lot less runtime and much simplified animation. Someone can correct me if I'm wrong, but I'm pretty sure no loop in this game is longer than a few seconds.
Just imagine what a group of talented artists could have produced by now even if they only started working three months after the tech update was announced.