It looks like we'll be getting a sequel to Deus Ex: Human Revolution. Square Enix has taken out a trademark on Deus Ex: Human Defiance, and since the first game was rather successful, this isn't a huge surprise.
Maybe this time around, the developer won't outsource the boss battles to another studio. Eidos itself admitted the boss fights were weak, so hopefully the company takes that to heart and either drops them or significantly improves them.
Square Enix trademarks Deus Ex: Human Defiance [All Games Beta]