Detective 676 (July 1994) has the third chapter of KnightsEnd, the storyline that sees Bruce Wayne regain the mantle of the Batman, by Dixon, Nolan and Hanna.
Nightwing and Robin break into the cave, but find no sign of Jean-Paul. Instead, they come across Harold, whom Dick has never met before, and almost attacks. Harold leads them to his secret work space, and also shows them the subway rocket.
Bruce, meanwhile, tries to challenge himself as he did on his first night as Batman, on the roof of Wayne Tower, but now finds himself wanting.
But for the bulk of the issue, Bruce has no time to challenge himself, as a horde of ninjas do that for him. Lady Shiva watches as Bruce defeats killer after killer, including one really impressive fight in the middle of a busy highway. Although she is responsible for their attacks, it’s just her way of fulfilling Bruce’s request that she test him. Never ask Lady Shiva for help!
Jean-Paul continues to be tormented by visions of St Dumas, but this time he has an audience for his madness, as Tim and Dick watch him on a monitor from Harold’s cave.
The story continues in Legends of the Dark Knight.