America: FDR, Washington
-Fine by me, though I would have rather had Teddy instead of Washington
Arabs: Abu Bakr, Saladin
-Islamic beliefs about showing prophets and company weren't paid attention in CivIII, what makes people think they'll change their minds now
Aztecs: Montezuma, Tenoch
-Might as well have the leader who founded the capital, besides, Montezuma's there because he's the only leader most people will recognize
China: Mao Tse-Tung, Qin Shihangdi
-No problems here
Egypt: Ramses, Hatshepsut
-I'd rather not have Hatshepsut, seems like they were desperate for female leaders, but I can't think of any good Egyptian Pharaohs off the top of my head
England(should be Britain): Elizabeth, Winston Churchill
-Other than my argument that the height of English power was actually British power, Churchill is a much better leader option IMO than Victoria
France: Napoleon Bonaparte, Louis XIV
-The best choices for the nation, and I certainly hope they didn't even think about the egotist de Gaulle, he was just as megalomanic as Hitler....
Germany: Bismarck, Adolf Hitler
-If Hitler isn't in, I will mod him in, but likeable or not he was a very important figure in German history, even if it were for the worse. I don't see how Hitler should be ignored, it's already obvious that the Civ developers don't take EVERYONE'S religious feelings into account (Shinto and Abu Bakr anyone?), not to mention several leaders included are certain to induce some sort of hatred from somebody in the world, it's inevitable. Besides, with the modability of the game, what'd stop people from making an Israelite Civ and beating the living crap out of him?

Besides, there aren't very many good Germanic leaders to choose from, even the Holy Roman Emperors were subpar for the most part.
Greece: Pericles, Alexander
-I still hate putting Alexander as a Greek, but I can't object, since I would like to see Hitler as a leader and he's not German...
Inca: Pachacuti, ???
-I'm not terribly familiar with Incan history
India: Gandhi, Ashoka
-I'd rather see Gupta or Maurya as a leader (unless I'm mistaken and Ashoka is one of them) since they led the two large, ancient Indian empires
Japan: Tokugawa, Hirohito
-I'll admit I'm not familiar with Meiji, but I'd rather see Hirohito anyway even if only for the novelty value of annihilating him in remembrance of Pearl Harbor:-x
Mali: Mansa Musa, ???
-Glad to see the Zulu out and one of the other three African empires (Mali, Songhai, Ghana) in, but I don't know enough about any of them for leader opinons
Mongolia: Temujin, Kublai Khan
-As good a pair as any to me, plus I can't honestly name any other Mongol leaders (except Ogadai)
Persia: Cyrus, Xerxes
-IIRC, Cyrus was responsible for the solidation of the Persian Empire before the Greek wars, while Xerxes was more military minded, would give two viable options for a Persian leader
Rome: Julius Caesar, Diocletian
-Funny, Julius was against the formation of the Empire, remember, he did turn down the crown three times
Russia: Josef Stalin, Peter the Great
-Peter for his modernizing Russia to match the West, Stalin for his military prowess. Besides, we all know Ivan the Terrible would also go down Hitler Road too, eh?
Spain: Philip, Isabella
-Isabella was directly responsible in the early formation of the Spanish Empire by allowing the exploration of the New World, while Philip solidified Spanish claims militarily, not to mention the formation of the late Armada
I can honestly say I'll probably end up adding several Civilizations to the game until the first expansion comes out, but I don't know just who yet....