I could see it, especially with DC. The numbers I've noticed have been a little underwhelming, but DC sales typically trend lower than Marvel's in the oversized dept. On a side note, DC should be wrapping up its "Rebirth" phase soon, 4 deluxes would probably be the max anyways, and we've already had solicits/fish for v3's, so it's not a stretch to assume they'd wrap them up.
Maybe the rumors are for post-metal material, and DC will chalk up the rebirth deluxes as a failed experiment. I'm glad they went for it though, and i wish Marvel would follow suit and up their ohc output, as i prefer the format