Bookstore OGN's, trades, and Scholastic book orders are definitely the strongest growing distribution formats (as far as I know) and seem like the most likely path forward. But I wouldn't rule out digital either. As we've said earlier in the thread, digital sales for comic publishers aren't terribly impressive, but there's some good reasons for that. It's a different audience, but comics just copy-paste the print product over with no adjustments to appeal to that audience. There's no real marketing or advertising behind digital, and the price point is ridiculous compared to other, similar products.
If DC made digital comics for a digital audience, it might fare much better than it has.