Note: "The Bat Men" finishes up in Chapter #15, followed by a one-shot story in #16.
So, Langstrom's bomb is about to go off, but if he detonates the thing before the timer that counts down, which I'm assuming would use the sonic tech he had stolen to in order to amplify the blast, the blast would be contained to the building he and Bruce are on, and Langstrom feels like a bit of martyrdom after last issue's self-pity.
Of course, Terry doesn't stand for this, and flies into the sonic shield looking thing that's covering the tower, and starts to wail on Langstrom, calling him a coward who just wants to go out with a bang because he doesn't like what he's become. Bruce holds Terry back and tells him that Langstrom has made his decision. Before Terry flies Bruce out of the blast range, Langstrom tells his old friend to do better with his second chance. Once both Bruce and Terry are out of range, Langstrom detonates the bomb, with one second left, keeping the blast to just the building itself.
After all is said and done, Bruce thanks Terry for everything, and they go their separate ways again. Sometime later, when Terry has met up with Dick again, Terry brings up the fact that Dick didn't tell him the hearing aids came from Bruce. But knowing how Bruce works, Terry figures the old man brought it up so he and Dick would actually have the conversation, and if there's one thing he's learned from the Man-Bat stuff, it's all about second chances... SPEAKING OF SECOND CHANCES. Terry finds Melanie in the restaurant she's working at and asks if she's willing to still talk to him over some coffee.
In the second story, Dick and Barbara meet at a restaurant (the same one Melanie works at) to have a long overdue talk. There's some unresolved tension between the two, as we learn that at one point Dick was ready to propose to Barbara, but that didn't happen, and she ended up marrying Sam Young.
The two haven't really been that close since, Barbara feels like every time Dick looks at her, he thinks she ruined his life, and she's starting to believe that maybe she did. Barbara hands Dick the batarang he was going to use to propose (which is what he gave her early on in their career as Batgirl and Robin, and ended up giving to her again on her wedding day).
Everything is sort of tense and awkward, both wondering where this leaves them. They'd like to be friends again, as both of them miss it, but everything is just sort of complicated. With that, Dick decides to break the batarang in two, and gives Barbara half of it. Later, Terry comes back after a night of patrol and asks how it went, to which Dick says amazing/terrible, but he doesn't need to talk about it, as if anything, they seemed to put a few things to rest at the very least.