humble minion
Legend
I suspect that WotC could make more money by keeping hold of D&D, letting tabletop development peter off and lie fallow, winding up game design completely, and licensing out the IP to video game companies than they could by selling off the IP to a new owner. I seem to remember hearing (though I'm not sure how accurate this is) that Hasbro has something of a policy of not letting go of brandnames as well.