Originally Posted by
Restingvoice
DC didn't even know. The creative team, at least I think up until the book editor, pitched and approved it, then send it to print while the higher ups were in a meeting. They only found out when they got back and the book's already on print. The team got reprimanded, though the higher up approve, they wish they told them first. It was likely the reason why the follow up story took so long and got delayed to Christmas. I think the team said the next story was supposed to be immediate.
As for how long the creative team thought about Bernard, I have no idea. Tynion, the head Bat writer at the time, only said he had plans for every member of the family, but that could also only mean that he's assigning Tim to Urban Legends, with the detail up to the creative team in charge. (He hinted in his tweet after he left DC that something happened that would make his teen self really happy)
If they're rushing the pitch and it only goes as far as Batman family editorial, it's likely they won't be able to get Bunker (or Conner for that matter) if they're under different editorial. Conner definitely, Bunker I don't know who's in charge of him now. Tim and Bunker used to be under the Young Justice (New 52) editorial.