Announced during the Nintendo Direct by Reggie himself.  The game will be released this summer.

Update:  First screens for DKCR 3D – 

3DS_DK3D_scrn01 3DS_DK3D_scrn02 3DS_DK3D_scrn03-1 3DS_DK3D_scrn03 3DS_DK3D_scrn04 DKCR3D copy