Square-Enix has announced that October would see some downloadable content for Deus Ex: Human Revolution in the form of "The Missing Link", which finds Adam Jensen stripped of his augs for a few days.
According to the description, Adam Jensen goes mysteriously AWOL for a three days, with Adam trying to escape a freighter without the benefit of his augs. The DLC will introduce a handful of new characters and enemies. The DLC will also allow the player to rebuild Jensen's augs from scratch.
Square-Enix has not priced the DLC, nor announced which platforms it'll be released for.