In issue 14 it was revealed by The Joker that they share a secret. What are your thoughts on what it is?

I have been thinking of that as well.

I think it may be that Batman killed someone. Not on purpose. And I doubt that it is anyone significant. Maybe in the heat of battle after Death in the Family?

My 2 cents.

The only thing I can think of, which is to obvious to be the secrete, is the whole dead brother thing. I'm not sure but i don't think anyone knows about it but Alfred and dick. But still I don't see how that could affect anyone. It has to be something that happened in past comics that scott will take and twist it to fit this perfectly. Just like he did in Court of Owls.

@redhoodnet But at the same time if Batman did kill someone, whom isn't significant... why would it be important for everyone else to know. That alone would haunt Batman and I think the others would understand if something like that happened. Again, it has to be something that will impact everyone including Batman himself. This is just to suspenseful, i can't wait till next week.

Yeah i share the fact that I just can not wait for every issue in this.

That he was the reason why we dont have a Riddler on the Nolan movies.

That Batman killed his parents.

In the 5 years before the new 52 the joker was robin

@The_jackolantern said:

In the 5 years before the new 52 the joker was robin

hahahahahahaha