Nintendo and Retro Studio are messing with your minds, as Nintendo tells CVG it's not developing a 2D Metroid game, despite hints in the latest Wii game, Metroid Prime 3.
Rumours of a 2D Metroid for DS, entitled Metroid Dread, ran rife at E3 2005 with the game supposedly turning up on a leaked release list, and later turning up on 'insider' blogs.