I have an idea, or a few.
1. Some summons escapes from the summoning world and we have to stop the rampage. It's possible that this can open up a chance for a contract perhaps.
2. ??? Organization starts to stick their neck into the village business.
3. Ninja scroll scavenger hunt, with the scrolls having some cool jutsu on it.
It's just a brainstorming idea, but I wanted to add something in the hopes that this actually helps.