Can you give us any idea of specific missions we'll be undertaking, or what objectives Alex will have to complete or what he/she will be up to?

Money: The great thing about a Deus Ex game is the player can really tell his or her own story. We provide a fictional outline and set up goals within that story, then let the player do things how they want, when they want.

That makes describing a Deus Ex game very difficult. My experience in the game will be totally different than yours, but we will share the commonality of the overall fiction.