"Looking at the small screen and the big screen at the same time is pretty distracting for a fighting game. So we're thinking of making it useful as a way of having shortcuts," he said.
"Or, by making progressing through the game more convenient. Or by playing alone on the GamePad screen."
Peter Molyneux also said last month that monitoring both Wii U screens can "be a bit demanding", and that sometimes players "seem to be confused about which screen they should look at when they play with the tablet".
Microsoft has also questioned the benefits of two screens when playing twitch games.