The World Intellectual Property Organization has ruled in favor of the current domain holder of WiiU.com in a case filed by Nintendo, according to Fusible. The website was first registered in 2004.
Nintendo filed the case in February of this year with the WIPO seeking to gain control of the domain that is associated with its newest console, the Wii U. Because the domain was secured seven years before Nintendo announced the console, the governing body sided with the original owner. While we do not know what Nintendo can do further at the WIPO to secure the domain, if it still wants it badly enough it will likely have to approach the owner with an offer to buy it.
Microsoft had a similar issue with the XboxOne.com and XboxOne.net domains, following the announcement of its new console. In May it filed a complaint to the National Arbitration Forum to claim ownership of the domains. Those domains are owned by a London resident and were secured in December 2011.