Having a quick look at the games announced, and the TMNT game has some of the best consistent and clean pixel art I've seen in a modern game.
Why I normally hate pixel art games (with a burning passion) is because they break the aesthetic by adding in advanced modern lighting, shadows, shaders or other effects. This TMNT actually looks the part. If it weren't for some overly detailed animations, I think it's plausible you could trick someone into thinking it's a 80-90s game.