According to French site Gameblog.fr , Nintendo is planning to announce the previously rumored Wii 2 which is codenamed Wii HiFi at E3 2010 next week.
To quote from the site, roughly translated: "But beware, according to our information from developers, the 3DS should not be the only machine unveiled by Nintendo.
It is becoming increasingly clear that the manufacturer would conclude his lecture by unveiling its next home console, named Wii is currently code HiFi!
We learn in the aftermath the next home console from Big N would be calibrated for release in November 2011.
• It would have a power similar to that of an Xbox 360
• It should not be called "Wii 2", but Wii HiFi (in any case the code name leaked)
• It would be very oriented online
• One of the main features is the community
• It would be released in November 2011"