Just in case the Just Cause series is successful enough to get a fourth entry, Square Enix wants to make sure it can employ any necessary URLs. As such, the company registered URLs in a variety of countries for "JustCause4" via URL proxy registrant Corporation Service Company, as discovered by Fusible
Neither Square Enix nor Avalance Studios have said much about the Just Cause series as of late, though Avalance studio head Christofer Sundberg told Develop in early 2010 that a third entry in the series
is very likely. It's also rumored that Avalanche has been working on a Mad Max-based game
; we haven't heard about that project since September 2010. Beyond Avalanche's Stockholm-based studio, the privately owned Swedish company opened a New York City office
in 2011 to work on an unannounced game only known as "Project Mamba."
Regardless, with just a few weeks left until E3, it's likely we'll hear more about whatever Avalanche is working on sooner, rather than later.