The news from Carmack indicating that a Wii U version is possible isn’t a surprise; after all, the technology is there to make it happen and the performance is good enough. What Carmack does not say is if they are porting the id Tech 5 engine to the Wii U, or whether they have any projects planned for the Wii U.
You never know: it still could end up on the Wii U (as well as other platforms) if it shows signs of being successful in its remastered re-release.
Read more here.