Fans of the Borderlands series are now welcome. At the Game Developers Conference 2017, the CEO Randy Pitchford of Gearbox presented software parts of a tech demo around the new Unreal Engine. The assumption is that the material shown here could be the next part of Borderlands. But try to avoid any connection to Borderlands 3, because its just a "technology presentation". Nevertheless, he did not let viewers and fans down without an official confirmation of the development of Borderlands 3. One might soon learn a lot more about it. The game has already been in development since January 2015.
An early announcement of the release date should not be expected, after all, Gearbox and its publisher Take 2 published Battleborn last summer. With which the developers might be busy for some time.