I cringe a little every time Deus Ex is mentioned to be made into a film. The original should NOT be made into a movie period. I've see no actor that could portray JC the way the game does.
If it's Human Revolution they make into a film then they may have a chance since Jensen seems to be more human. People could relate to him more, even after being augmented then they could with JC. I think Jensen would be easier for an actor to portray with success. On top of that, the plot is less complex than the original was imo.