According to Siliconera, Square Enix have copyrighted the name Deus Ex: Human Revolution. If it is, or isn't, the true title of upcoming Deus Ex 3 remains to be seen. Deus Ex 3 is a prequel to Deus Ex and Deux Ex: Invisible War and is under development at Eidos for Xbox 360, PC and PS3.
Since it's coming to PS3, at least we can be comfort ourselves with the fact that "human revolution" probably doesn't mean "flailing around with your arms in front of Natal", unless they are adapting it to the PlayStation Eye. Oh no, now I won't be able to get that thought out of my head...