@pikahyper: It was part of initial announcement (link, sixth paragraph), but I'm reading a liveblog of the C2E2 panel where they brought it up just now and the wording said "after they see print." But it's someone feverishly typing down info they're hearing and these things have been wrong before, so it could be day and date or it could be a week later, we'll see.
One of the things that sort of concerns me is if say a new character is introduced in one of these, and the wiki would most likely list the first appearance as Convergence: Whatever #2 when a more accurate representation would be something like Midnighter Special Preview #1 or whatever they'd be called.
So, starting in May, DC is going to be running 8 page previews for all their June books in the back of each convergence title. Specific Convergence books will get specific previews, and my question is how should this be handled in the wiki?
My gut reaction is that the characters/creators involved in the short stories shouldn't be added to the Convergence issues for two reasons, the first being that there's no relation to what book a preview shows up in and the preview itself, crediting X writer on Convergence title Y isn't exactly truthful, as they just wrote a story that, by luck of the draw, was put in that particular issue. The second reason is that DC will be releasing these previews for free outside of the Convergence issues, via digital means like Comixology, which would count as its own volume, no? I think crediting the exact same content from the same publisher twice on the same day would be a bit wasteful.
Those are my thoughts, just looking for some guidance before that first Wednesday in May.