Hey jouster, very interesting idea! I have a few comments on your piece.
I really liked the first image, I think it has great lighting and contrast and it is generally much clearer. As you move to the next images, this clarity is getting lost unfortunately. All the new elements you added are somewhat distracting from the old church which I assume is your focal point. Not only that, but they are also distracting from the story you are telling. Especially in the third image, the knight has lost all the focus he had and is now part of the foreground.
The dragon is also quite hard to see. If it wasn't for its tail in the back, I don't think I could distinguish it at all.
I think you have tried to squeeze so many things in your painting that the focus on your story has been lost. My suggestion is, try to have a picture like your first one, with a clear focus on your base story (the church, the knight and the dragon). If you want to add extra secondary elements, make sure they are not stealing the focus from your main story.
Please understand that this is only my opinion and I have no intention to make you feel bad or anything like that. I think your idea is great and has a lot of potential to turn into an epic scene
Good luck and keep it up!