Thread:KingOfSting87/@comment-4708882-20190407135249/@comment-26833018-20190408123850

Because Bruce is known as Batman just as much as Bruce Wayne in the series while John is only known as Joker at points in the final episode of The Enemy Within. Coupling this with the fact that John is an alternate version of the Joker in a different continuity further warrants use of the John Doe name.