>>150959567 (OP)
The only way to make batman beyond work in JLU is by making the return of the joker what ultimately breaks him
Dick is in Bludhaven and finds out from Batgirl that Robin has been kidnapped.
Nightwing and Batman have it out over Tim being kidnapped.
They find Tim and things go mostly the same except Barbara is injured by Harley nearly crippling her before Barbara kills her in the disney thrown off the cliff way.
Nightwing 100% blames Batman and himself and takes Tim to Bludhaven
Batman can't cope with letting down his adopted son the guilt of not killing the joker and his son carrying it.
Barbara can't done the cape anymore and becomes the oracle.
The now amnesiac Tim, who is suffering from severe trauma is given a new identity as Warren. Warren McGinnis.
He doesn't remember his mostly estranged grandfather Bruce nor his adopted mother Barbara. He becomes the grey ghost.
Later he meets and marries gives up the grey ghost identity to become Detective Drake. One day he dissapears after going after an old lead on an old batman villain in Gotham.
Terry follows the trail of his missing father to the door of his estranged grandfather Bruce Wayne.