Well let's speculate some more ...
Hatamoto stated there would be altogether 14. After some reflection, I think this is a very reasonable number. I have made a list of possible Countries

1. Christian Kingdoms:
England
France
Germany
Spain
Italy
Byzantinum
The Kingdom of Jerusalem
(maybe divided into Jerusalem, Tripolis, Edessa and Antioch)
Poland (maybe)
Hungary (maybe)
German Knights (maybe)

2. Muslim States
Seldchuks (Jordan, Syria)
The Fatimid Kalifs (Egypt)
The Almohades (Southern Spain and NW Africa)
Damaskus (maybe)

my total number:
between 10 and 18

Spanning most of Europe, Asia Minor and Northern Africa, this make up for all major wars of the middle ages:
The Crusades
The Spanish Reconquista
The Eastern Crusades
The 100-year war
etc..

Quite exciting, isn't it?