With Mass Effect 3 coming to the Wii-U many have already said it would be a wasted effort porting over the xbox/ps3 version due to everyone would who have wanted to play it would have by then and that without playing the previous games the story would be lost on some, but according to some reports Mass Effect 3 for the Wii-U will be an exclusive enchanced version with a new story. No mention of this was mentioned in Nintendo's recent E3 show so we can only hope EA or Bioware start talking about it soon
source-http://www.maxconsole.com/cgi-bin/maxconsole/rknewz.pl?function=detail&id=RKLS00000010034&cat=WII
source-http://www.maxconsole.com/cgi-bin/maxconsole/rknewz.pl?function=detail&id=RKLS00000010034&cat=WII