From comments I've read on other forums, the Wyvern itself wasn't that popular. Maybe sell the Orc on top separate to at least get some sales of that kit?
Don't be too quick to listen to peeps on the internet - people are quick to criticise, slow to complement.
IMO, the Wyvern itself is excellent, though I think the head is the weakest part - the rest is brilliant. The Orc is very characterful - very GW, but still nice. The model could use a base, to put it into context.
I'd go ahead and use these images for the product pages, clipped out onto a white background, and get them back to the blog and all the other news sites. We considered going to Orc themed sites e.g. Da Warpath, with this? Try and ride the 8th edition GW book a little!