My personal feeling is that companies are holding those odes off because of the still small wii u user base (the latest numbers are around 7 million users). Take note that both cobra and k3y (wiikey) have ode for ps3 and the fact that the ps3 user base is more than 90 million, this means that they have more than 90 million possible customers (that both cobra and 3k3y (wiikey) have odes). So they want sell ps3 odes first and then for wii u.
You could be right, but the Wiikey U is finally due out mid-July or August, as long as it doesn't get anymore delays . We're so close....