It appears there might a big split within Nintendo over the idea of releasing a redesigned 3DS any time soon with Miyamoto against the idea of a "Lite" or a new version being possible and the "boss" of the 3DS division, Hideki Konno, hinting an XL version like the DS could be possible for Smash Bros 3DS.
Miyamoto would rather have the focus be made on improving the 3D effects for games while Konno would favor bigger screens to help improve gameplay.
http://www.engadget.com/2012/06/08/n...lement-of-sur/
http://www.ign.com/articles/2012/06/...eld-generation