Some Ideas listed below

While the game starts in 1066, their are few certain dynasties that played an interesting and important role during this time and between the years 900-1070, which are the Colonna,Cinarca Spoleto and Tusculani. I think it be interesting to see some events for these families/dynasties at this time and also having the marriage and chosen successors.

Listed below are some interesting links and sources and possible new ideas for the mod
1. https://en.wikipedia.org/wiki/Saeculum_obscurum
2. https://en.wikipedia.org/wiki/Counts_of_Tusculum
3. https://en.wikipedia.org/wiki/Colonna_family
4. https://en.wikipedia.org/wiki/Black_nobility
5. https://en.wikipedia.org/wiki/Papal_nobility
6. https://en.wikipedia.org/wiki/Category:Papal_families
7. https://nobilitytitles.net/pontifical-and-papal-nobility/
8. https://m.famousfix.com/list/papal-families
9. https://www.amazon.com/Papal-Genealogy-Families-Descendants-Popes/dp/0786420715