No matter how good or bad they are, the prequels will not judged on their own merits. They will all be compared to the original and will fail badly. I am sure that some of the art will be nice but I suspect that the writing won't have that extra whatever that Alan Moore brought to his work.
I used be relatively optimistic about the future of comics but with the DC relaunch and now this, I am not so sure. Oh, if they only tried something new.