Alright. As we know about different sources, there are three cities in this game. Acre, Damascus and Jerusalem. I've been gathering some information and links of them, that I hope that you find informing, and as what we might be having in the game. From what I have seen, and considering the realism Ubisoft is thriving for, probably most things listed here is in the game...of course I am not sure.
I guess this thread could be used as primary discussion of these cities? Unless there is a thread for that too.
Map of Acre as it is now
Acre was the city shown in the recent X06 Presentation. It is smallest of the three cities. It is about 95 miles from Jerusalem. Acre is very important city, and in the end of Third Crusade, it became the capital of Kingdom of Jerusalem. As this game takes place during the Third Crusade (1189-1192), it can be assumed that it is under the control of Guy of Lusignan, who besieged it during 1189, in the Siege of Acre, probably the most important event of the beginning of Third Crusade. I don't know if this game takes part after Siege, or before it. Acre is also one of the most important locations of the Templar Knights, so the game should feature lot of them in there. You can see the sights of Acre from the link to Wikipedia and the map.
Map of Damascus as it is now
As I have counted the distances between cities, I'm pretty sure that you won't travel to city by foot or horse from any of the other cities. Currently, Damascus is the capital of Syria, and is about 136 miles from Jerusalem. From this city, we should find (they would not leave him out the game, I am sure of that) Saladin. Damascus is under his control. The city apparently has lot of walls and such, so I think it should be a climbing haven. The link again has the sights of Damascus and more information.
Map of the Old City of Jerusalem as it is now
I guess, as Jerusalem is the most important city of the three, that most of the action in the game happens here. This is also the largest city, I think. It is under the control of Muslim forces of Saladin. The most famous sights in the game will be here. There is the Tower of David (Will be fun to climb it ), The famous Western Wall which is one the most important sites of the Jewish religion, the Al-Aqsa Mosque and Dome of the Rock, important locations for Muslims, and the Church of the Holy Sepulchre for Christians. I think this will be the most fun and diverse city of the game.
Can't wait to see what the developers come up with these.