He hesitates for a moment, unsure how much he should be revealing, and then realizes that his hesitation signals that he has something to hide and there's really only one thing he could be hiding about the answer to that question, so he probably just gave it all away. Good work, rookie.
"Maybe," he says, more for form's sake than anything. Trying to keep things from the Joker seems to be a losing battle.
"Well, we could've used him before Blackgate," he says. "Now... well, he can probably get more cops on his side than I can, but most of the cops in this city are down a hole right now." He thinks for a second, then adds, "He'd make good traitor bait, at least."
He still hasn't mentioned the Joker to Gordon. Maybe he'll explain who he's been meeting at night and Gordon will shoot him. But who is he to talk? Wasn't he just saying that someday John would be grateful to have somebody around to dirty their hands for him? There can't be many people more qualified for the job.
"You'd have a hell of a time convincing Gordon to work with me," the Joker says thoughtfully. "But we need more help than we've got. My boys are good to have around, but I wouldn't count on 'em not to be taken in by Bane's savior-of-the-people line."
His hands sketch the result in the air, a dispersal of violence through the streets of the city; he shakes his head.
"I think a lot of people believe in what Bane's selling, but I don't think he does. 'Cause take it from me, what he's done so far is a great plan if you want a lot of people killing each other and feeling good about it. If you start out thinking about freedom and equality, you don't come up with this."
John wonders what he's gotten himself into.
"I'm just... thinking," he says, after a pause. "Don't worry about it. It's not important."
Pen thinks, then nods. Then she thinks some more and nudges Cindy. "You maybe friend help doing things?" she asks.
"Thaaat depends," the Joker says musingly. "Could be. Could be he won't bite. But I don't think we'll lose much by asking. Hey, Johnny, wanna do me a favour?"
"Not even a 'depends on the favour'? Don't tempt me." But he flaps a hand, dismissing this subject. "No good playing tricks when we should be working, though. Nah, there's a couple people I want you to find. Nothing too dangerous. Not even too shady. Well... comparatively."