In the recent episode of DC All Access on YouTube, Dan DiDio revealed that the first Black Label project, Azzarello's and Lee Berjemo's Batman: Damned will be published in the graphic novel size that we saw a lot of in the 1980s (think "Death of Captain Marvel," etc.) that is still used for European Comics Albums like Tintin or Asterix. Some Black Label stuff will be published at standard comic size.
DiDio said that he knows it's a risk because people want things in comic book size that they can put in bags and file in comic boxes, but he feels that having larger size art will make this format and these more grownup stories "pop."
For me, I have no problem with the Graphic Novel size rather than the trade paperback size. If you want to bag/board/box them, get magazine-sizes of everything. Yes, it won't be able to be filed with your other comics, but I do agree that the larger size makes for a more special experience.
I wouldn't mind seeing the return of the Tabloid/Treasury Edition format either. I think it worked great for the Dini/Ross stuff DC put out years ago. However, I wouldn't mind seeing these albums stapled instead of squarebound so that the book can lie flat.
So, what are your thoughts on using the Graphic Novel size for Black Label? Would that give you second thoughts as to buying the product?
You can see DiDio's interview here, cued up to the point where he talks about Black Label and Batman: Damned.
https://youtu.be/wu9GWenzXEE?t=460