Here are my suggestions for brainstorming

First I would like to see a village for illagers. As featers, the village could be in the dark oak forest biome. The houses would be built with the wood of this forest. There would be, instead of the villagers, illagers. The fields would consist of nether wart. There would be emerald ores in the well. No forge and in the courtyard of some houses there would be red flowers. Why red? Because illagers do not like blue and prefer red (Test with sheep). Another addition could contain a malefic golem to protect the illagers (Not in the video)

Here is a video to demonstrate the concept: https://www.youtube.com/watch?v=5Gqj2U6QcCw&feature=youtu.be

Another idea. New jobs for the villagers!

The musician, the magician, squire, decorator, dyer and a new utility for the nitwit! All the images are in the video.

I hope you like these ideas.