Apparently a sequel is being planned.
According to "Den of Geek" the sequel is separate from Jason Bourne, it will be a sequel to The Bourne Legacy, Gilroy won't be directing.
The sequel will be a great action flick, none of the Bourne movies have failed to disappoint, there are some that are better than others (example "Legacy" - it is not as good as the previous films) but they clearly want to make things right with fans and give Legacy a second chance.