I am incredibly afraid for Deus Ex 3. The art style is good and very faithful to the original game while still appearing original, and the premise of the setting and story we have learned so far is also promising, if somewhat predictable. What I am really concerned about is the addition of things like cover systems, regenerating health (explained away by nano-bots, but the game is a prequel to the first two... uh, technological regression?) and a general emphasis on action and stealth... not that action and stealth are bad, but we have seen nothing of the character interaction in the game, and I'd like to be able to get through the game without killing a single person, as well as be able to talk my way out of most situations.
I'm also afraid that the console development will kill a lot of the complexity. One of the best features of the original Deus Ex is in the redundancy of a lot of the abilities - it doesn't matter if you have three ways to get more effective underwater breathing, what matters is that they all have their pros and cons and can all stack up if you really want to be an amazing swimmer. They tried to get rid of redundant abilities and complexity in the inventory management etc. for the sequel, and that wound up basically destroying half of the gameplay depth. Furthermore, the original Deus Ex is well-known for its strong exploration element, as well as its inclusion of vertical space to scale (the ability to literally jump dozens of feet in the air to climb up skyscrapers is something that I have still not seen in another game to this date). The level design is so brilliant because for any given mission objective, you are given a location to reach and then dropped into the world, and it's up to you how to get there, whether that be by sneaking through ventilation shafts or blowing down the door and a bunch of patrolling guards. I have a suspicion that Deus Ex 3 will be much more rooted in shooting and combat elements, and that its "open-ended world" will really consist of a bunch of branching linear pathways. This isn't based on paranoia, mind you, but by comments made by the developers in interviews and on the official forums. After they introduced cover systems and regenerating health, I pretty much said "fuck it" and gave up most of my hope.