Bruce knew Dick was there, things with no heartbeat couldn’t sneak up on the man and things with heartbeats were at more disadvantage - he could even identify the presence of the League’s metas, magic users and aliens and tell who it was without even looking at them and Hope in particular having multiple hearts was a dead giveaway to the Detective. “Never confuse silence for safety. Gotham was quieter than this before I trained you, and you know how that turned out better than most.” That was by no means a dig at Dick or the terrible loss of his family, just a statement given from experience. “There’s no such thing as a break in this city, Nightwing. Never forget that.”
He could see Roy on ground level and realizing he didn’t have any kind of grappling gear he tapped a button on his utility belt and a small drone came to him from Wayne Tower with a small container with a black and gray Batman insignia on it. In the case was a spare grappling gun, gas canisters, various hooks, a spare line and a gas mask which he directed to the archer’s location. You’re gonna need these, Arsenal. The Ace Chemical plant is a dangerous place you don’t want to stay on the ground in. There's a strong possibility of Joker toxin gas inside so be ready to get to Bruce planned for everything, it was one of his many shticks, since he hadn’t specified what kit to bring it was only fair to amend his mistake.
Bruce tapped his commpiece to make a call to Commissioner Gordon, if they were gonna put a stop to the gas production and round up Joker’s men, it would be much harder if Gotham PD officers were in the area, best case scenario for them they’d be captured and worst case the Joker would put a smile on their faces...permanently. Jim, I need a favor.