As far as i know, the 7GB free for games is just a rumor.
But even if it`s true doesn`t mean everyone will use it right away or anytime soon. It would take a lot more time to take advantage of all that.
Meanwhile...
As long as PS3 and Xbox 360 keep getting ports, there`s no reason Wii U can`t a port. Not to forget that Nintendo was giving Gameware for free and that includes CryEngine 3.0.