Originally Posted by The Batlord

I imagine because DC has been trying to make its comic universe "grim and gritty" and "mature" for the last few years, with very inconsistent results, but they aren't taking the hint and are trying to make the same thing work with their movies.

Whereas the company has a decades-long history with the DC Animated Universe of putting out high-quality TV shows that aren't self-consciously gritty.

That's my assumption at least.