And they're a pretty big company. They're a PLC trading on London Stock Exchange. (http://www.londonstockexchange.com/exchange/prices-and-marke...)
Perhaps making large shareholders aware of the PR damage the company is about to take is a viable path.
The main difference, of course, is that WH40K is wargaming min-maxy and specific troop-based versus D&D allowing a great deal of flexibility in the rules and creative content.
GW has no affiliation with WotC. Are you thinking of TSR, the makers of DnD?
Hasbro (wotc is subsidary) also rehashes, maybe more so. They're only innovations are sales and marketing based. They recent innovations online portal, 4ed and gamma world have flopped hard.
That said, it's still not pretty.
Cred: I have two Warhammer tattoos on my forearms.