I think from previous posts there already exists a grassroots support for WAB, I believe there are still WAB games days which attract a reasonable level of gamers. Despite the hype , I don't really think the so called successors offered anything new or were superior to WAB.
I remember a couple of years ago attending a WOTR themed day at Wayland Games and with minimal advertising, we really just wanted to book a couple of tables for a reunion battle between four of us, and were surprised when 10 gamers had joined us!
I actually think WAB was a very good seller unfortunately GW didn't seem interested in the product and still hold the copyright over all published and even the unpublished supplements.