I plan to have quests, but I vastly prefer quests the player determines for himself rather than quests through the event system. For example I could have a quest that says "Defeat a certain barbarian unit to gain a powerful weapon", or I could just add Orthus to the game.
Capturing animals, robbing graveyards, exploring for goody huts, destroying the pyre of the seraphic, springing your desert tiles, taking a city to gain access to iron, etc. Those are all player initiatied quests. And I greatly prefer flooding the player with things to do from that perspective, where they intermingle with all the other aspects of the game and can be played with and dynamically reacted to more than a static list of "Build x forges" and such.
I do suspect we will see some static quests, but I really try to implement in a more dynamic way.