I suspect it won’t be for sale. My search is finding that DC Comics is forbidding the marriage, so the artist, J.H. Williams III, and his writing partner have quit.

You could probably get any printer to make a print from a high-resolution digital image – and they appear to be around with minimal searching.

I think for personal use, it wouldn’t be a big deal. If you’re worried about copyright, you could write to the artist for permission. I doubt be would mind; it’s not like you’re going to mass produce them for sale.

Personal use or not many places won’t touch anything that could be subject to copyright for fear of getting a giant $5,000/hour legal team dick up their ass. And it’s doubtful that the artist himself has any rights whatsoever to the image. It’s DC’s property.