Just Cause 3 or 4 has not been announced yet but it seems Square Enix wants to release a new Just Cause game.

Square Enix has just registered domain names for JustCause4.com, JustCause4.fr, JustCause4.co.uk, JustCause4.de, and JustCause4.it.

So you can guess that Just Cause is coming somehow, maybe we can see something at E3 next month. Stay alert!