Here´s a taste:

...Who now owns the rights to produce D&D licensed games? I´ve rambled a lot in the past on the D&D licence, but the status of the license still isn´t clear. Interplay currently has a non-exclusive license to produce D&D games for another year or two (covering Neverwinter Nights, for instance), and has the right to request a renewal of the licence with the consent of Wizards of the Coast, "such consent not to be unreasonably withheld". That last clause is usually legalese for a sure thing, but since the granting of the original license to Interplay, Hasbro (parent company of Wizards of the Coast) has sold the rights to make D&D games to French publisher Infogrames - so there likely are "reasonable grounds" for withholding consent and not renewing Interplay´s licence.