Greek Lighthouse and Dock: The role of the Lighthouse is yet to be confirmed, but some people think it is where non-military naval ships are trained and improved. While the Dock is just like te AoK counterpart, except it will probably only be able to train and improve military naval ships.
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GREEK
The Greeks is the culture most like AoK's Civilizations. Their buildings are probably going to be weaker then the Egyptians, but stronger then the Norse, and cheaper then the Egyptians, but more expensive then the Norse. The only other thing i can think of besides that is that the Greeks combine there lumber and mining camp to make one drop off site (so they have a total of two drop off sites)
Greek Fortress: Unlike the Norse Hill Fort, the Greek Fortress cost more but is also stronger, however it will probably be cheaper then the Egyptian Fortress, and weaker, too. It will be able to bombard enemy units with arrows, but unlike the AoK Castle, it will not be able to build units.
Greek Temple: The Greek Temple is where you build and improve your Mythological Units. Heros (the Greek heros are named after Mythological heros, unlike the Norse hersir and the Egyptian "Pharoah") can bring Relics to the temple and will gain that specific relics bonus. Also, the Greek Temple is where villagers go to worship there god to gain favor, they can also gain favor at the Shrine.
Greek Shrine: No word yet on what this building does, but in one screenshot you can see villagers worshiping at it. So this building probably fullfills the same role as the Temple, except it cannot train or improve Mythological Creatures.
Greek Academy: The Greek Academy is where the Greeks train and upgrade their infantry (like the hoplites and the hypaspists). However, unlike the Egyptian Barracks, the Greek Academy does not train or upgrade Archers, they have a whole different building, called the Archery Range, for that.
Greek Archery Range: Unlike the Norse (who dont have any Archers) and the Egyptians (who build there Archers at the Barracks), the Greeks have a seperate building to train and upgrade their Archers.
Greek Stable: Cavalry units which will play a supporting role for the strong Greek hoplites are trained and improved at the Stable.
Greek Siege Workshop: Catapults, Ballistas, and Siege Towers are among the siege weapons that have been anounce for the Greeks. They will most likely play a supporting role, and not be the main units of the army.
Greek Tower: Towers will most likely be the same as they were in AoK, they attack oncoming enemies, and will protect friendly units by allowing them to garrison inside, the garrisoned units will also increase the attack power of the Tower.
Greek Outpost Outposts, if they function like the AoK Outpost, will merely provide you with a large LOS. However, there is rumor that if you garrison units inside, it will be able to attack.