Would the Austro-Hungarian empire have Budapest or Vienna as the capital? tricky question.
I also suggest Transylvania. Leader - Vlad Dracul, aggressive expansive.
UU - vampire (replaces swordsman): can ONLY be killed by swordsmen built by civs with access to silver. But building him stops your city growth (like settlers/workers) due to the need to feed him.
UB - crypt: replaces temple. Allows construction of vampires, -1 city health.
Vienna, obviously. Austria was the dominant partner.
And this is from another thread that I made before I knew this thread existed:
I would say that one should split the Arabian civilization, it should represent the Arab Caliphate (Umayyad, Abbasid, Rashidun), not the Arab world! Saladin as an Arabian leader is rediculous, he should be an Ayyubid or Islamic Egyptian (Misr?) leader, which would also givve a new civ. The leaders of Misr/Islamic Egypt could be Saladin, Qutuz, Baibars and/or Muhammad Ali. Other possible African civs are Aksum, Numidia/Berbers, Morocco/Moors, Kongo and Songhai.
To complete the Mesopotemian civilizations, I would add Assyria and Akkadia. Possibly some non-Persian Iranian civilizations, such as Parthia or the Medes/Media. Some more Turkic civs would be welcome, such as the Seljuqs, Ghaznavids, Timurids and Uighurs.
Maybe a North Asian nomadic civ, like Scythia or Xiongnu.
And now we got to Southern Asia/Indian Subcontinent. The Kushans, Magadha, Mughals, Satavahana, Pala, Vijayanagara, Chola, Sikhs, Hoysala, Delhi Sultanate and finally, the Deccan Sultanates are all valid choices. If I had to choose onlly a few, I would choose Magadha, Mughals and the Chola.
For Europe, I'd finish with Italy, Cumania/Golden Horde/Kipchak Khanate, Austria-Hungary or simply Austria and Francia/Frankia/Frankland.