Riddle 004: Stumped?

[questionauthority]

...Harley. Are you at home right now? I... I need to talk to someone.

[Ed's not sounding so good.]

Comments

[puzzlerprince.livejournal.com]

Ha! Wouldn't that be something? Just to see the look on Batman's face! ...I don't think even he remembers the last time he smiled.

[Scanning the pages.]

...or the last time he called anyone "Old Chum," for that matter.

[crazyclownwoman.livejournal.com]

It's been ages, that's for sure.

[Laughs at that]

Old chum? Really?

[puzzlerprince.livejournal.com]

Take a look.

[He hands her his comic and points to a bubble towards the bottom of the page. But something else (http://luchins.com/category/what-were-they-thinking/batman/page/4/) has already caught his eye.]

Oh my. What do we have here?

[He takes the comic in his hands and laughs hysterically.]

[crazyclownwoman.livejournal.com]

.....a..baby?

[Bursts out laughing as well.]

[puzzlerprince.livejournal.com]

S-seriously, how ridiculous c-could it---

[He can't even finish his question, he's laughing so hard.]