Let's assume for the moment that they ARE Adams' plates. Just for the sake of discussion.
How do people feel about the idea of turning out digital prints off them as well as traditional print methods? I presume it's not going to be inkjet though, but a commercial print job using a digital file. And only 250 of them? What size? And will there be a future print series in a different size? Who knows? It's happened before.
Consider both the ethics and the value proposition.
I have some (genuine) Ansel Adams photographs hanging on my wall. Image size is 24x20. They're not inkjet or commercial prints - they're posters, printed by lithograph, and they cost around $30 each from memory. The organisation behind these latest discoveries is proposing lithograph prints at $45 (fair enough) and digital prints at $1500. Is a digital print worth any more than the poster?
They say the prints will be taken off the original negative. Well, the file might be, and once taken they're not going to rescan for every print, are they? And the plates for the lithograph will only come from a single scan too, I imagine. Maybe even the same one-off digital file.
I don't think I'll be laying money of that nature down on a (could be) Ansel Adams print that (could be) non-exclusive. I mean, they're not going to destroy the negatives after the initial print run, are they?
Just sayin'.