A promo/preorder ad for what looks to be the as-of-yet unannounced fourth entry in the franchise is currently up on Steam.Clicking for details doesn't work or reveal any additional information about the game. Instead, you just get redirected to the front page of the Steam store, so there's currently not much to go on.
Last month Just Cause 4 was listed online by Walmart, alongside several other unannounced games like Gears of War 5 and a new Splinter Cell.
Just Cause developer Avalanche Studios just announced a new game called Generation Zero, which is planned for release in 2019 on PC, PlayStation 4 and Xbox One.
Avalanche is also co-developing Rage 2 with id Software, recently opened a third studio in Sweden, and was recently acquired Nordisk Film. Alex Gilyadov is a freelance writer for IGN. Be sure to check out his YouTube channel and follow him on Twitter.