IMO the next DLC should focus for sure on Africa, anf there are many great options and empires left there tp cover like Somalis (Adal sultanate), Zimbabwi empire and Kanem-Bornu empire.
Here I want to talk about the Kanem-Bornu empire and why it should be in the game.
The Kanem–Bornu Empire existed in areas which Cameroon, Central African Republic, Chad, and Nigeria. It was known to the Arabian geographers as the Kanem Empire from the 8th century AD onward and lasted as the independent kingdom of Bornu (the Bornu Empire ) until 1900.
This empire got a great influence and power in central-north Africa with great power of wealth and military!
The Kanem empire existed from 700AD to 1380AD that succeeded by the Bornu empire from 1380AD to 1900AD!
The Kanem empire played a major role on the trans-Saharan trade route.
Sayfawa was name that the muslims kings of Kanem empire called themselvs with (or mai) got a great power to the point that when Mai Dunama was the head of Sayfawa went to Hajj (Pilgrimage) to Mecca his wealth included 100,000 horsemen and 120,000 soldiers!
The Kanem-Bornu empire was a very famous for their cavalry in central and north Africa and also their infantry with great economy and leadership that helped to keep the empire alive and existed from 700AD to 1900AD!
It depends on how many African civilizations the game accepts and how large the scale we want them to be with.
I stated that for geographical reasons. If these Western Sahel kingdoms were to be represented in the game now, they would all be represented by Malians. In other words, this Malian civilization is actually Western Sahelians. In the same concept, the new civilization may be Central Sahelians, just named under Hausa or Kanembu.
Ali Ghazi as a Historical Battle. He reconquered the old Kanem capital.
Idris Alooma as a campaign. His military campaigns are recorded in Arabic, but are translated. Feel free to buy that book. Sadly no one has shared information from it on the internet. He conquered the Bagirmi Kingdom, Hausaland, Air Sultanate and many more. Dunama Dubbalemi is also well recorded.
There is a speculation which states that Kanembu under Idris Alooma defeated the Ottomans. It is wildly known that the Kanembu got Ottoman guns. The Kanem-Bornu Empire and the Moroccan Saadi Sultanate were allied against the Ottoman imperialism so I find this theory vaild.