http://www.nintendolife.com/news/2014/11/eiji_aonuma_confirms_majoras_mask_3d_has_been_in_development_since_2011
Since it's been in development for so long, it must've been shelved for a while. I doubt Aonuma wanted too many re-releases clustered together anyhow. MM 3D is releasing at almost a perfect time. Anyway, if you look at the above article, you'll see Aonuma said that he didn't want MM3D to be just another remake, probably hinting new features. I think that's all we need to know.







