A page for Kamikaze takes us a week to complete mostly due to balancing day jobs. There's three of us on the team (otherwise it'd take waaaay longer to do). We start out with thumbnails and go from there. Our pipeline follows the animation pipline almost exactly: including full color backgrounds, modeling, vector builds, rough drawings, clean up drawings, ink, paint, effects, lettering and then compositing. It's so time consuming but WELL worth it for the results we get.
Here's our most recent page.