Originally Posted by
Restingvoice
When New 52 began they created a pretty clear hierarchy
Justice League being the beginning arc sits at the top
After that the lines are divided between Superman family, Batman family, Green Lantern family, Justice League family, Young Justice line, Dark line and Edge line.
Each family has their heads that direct where the family story goes. Superman is Superman, Batman is Batman, and so on.
The story starts in Batman and then it bleeds to Nightwing, Batgirl, and so on. These family titles are considered equal to each other but under Batman.
So at the top Justice League and its equivalent direct where the story goes, like how Forever Evil and Darkseid War worked.
Then, the family heads. The story started with the head of the family, then spread to the family members book. Whether it's The Court of Owls, Bruce Wayne suffered amnesia, or Bane targetting the family, the family books adjusted the story to accomodate what happened to the family heads.
The line has disappeared now but the attitude remains the same, and you can see that the Batman symbol is still being used under the Nightwing title instead of his own symblol. Also from what I heard it's been going on since Infinite Crisis, where the event destroyed Bludhaven, and then Final Crisis that killed Batman that forced Nightwing to leave New York and cancelling his book to be Batman.
Management wise, it makes sense to do a top-down and radial spread out storytelling if they have one large story. The problem is they consider every character at the lower tier to be supporting cast to the upper tier, despite being main characters themselves.
Beyond New 52 setup, or if you pay attention to how the title symbol is used, they never made this clear to readers, making them think they're buying a book of equal measure when they're only buying a supporting character to a family head, and supporting character to larger story, that DC let run around free for a time until the next large plot point happen and they have to follow it.