I always hit this ugly point in a painting. All of my careful planning and thought appears to start unraveling at this point: I start seeing all sorts of new flaws in the image, like the problematic transition area between the ninjas and the pirates, and I begin to question my judgement.
Fortunately, experience tells me that the best way to get through this stage is to ignore the voices of discouragement and keep pressing forward. Sometimes the best thing to do is avoid the problem areas and continue with your favorite parts, waiting for inspiration to strike. Other times the best thing is to ask for help. This time, I'm going to do both. Help, anyone? What's bothering you and how should I fix it?
On a positive note, one decision I'm sure of now. That's whether the scene should be day or night. I started this out as a night scene, and I knew within about 15 minutes that it wouldn't work out. I initially agreed with everyone that said it should be night, but when I started painting it that way, I started to see all sorts of distracting problems caused by a relatively close spot light---particularly in how it spread the shadows over the figures. I think I'd have to start over and rethink the scene if I wanted the night thing to work. I'm glad people suggested night though, because I probably would have started with the day otherwise, but then always had a nagging doubt that maybe night would be better. Now I can move forward, knowing day is best.
That is, until Adam or someone else does a paintover and proves me embarrassingly wrong.