As revealed in "Triptych", Batman and other six Team and Justice League members formed a secret group as a means of contravening the Light by using their own methods. Miss Martian, Aquaman and Wonder Woman are part of it and the reaction of the latter two to Batman's defection was staged. The other three members are Nightwing, Oracle and Robin. Between the seven of them, they coordinate six teams of heroes, none of whom are none the wiser to their scheme.
Why is Dick apparently keeping Oracle's tech support a secret from Artemis?
As revealed in "Triptych", Nightwing and Oracle are part of a secret group of seven Team and Justice League members that coordinate six teams of heroes, who are not aware of this. Oracle provides tech support for each team leader.