Throughout 2005 and 2006 there were announcements, rumours, release dates, denials and reports of cancellations regarding a new 2D side-scroller Metroid game released for the Nintendo DS titled Metroid Dread. A game still yet to appear, if it ever will.
That was all it was though, rumours. Magazines and websites would release announcements regarding the mysterious game with no substantial evidence to back up the fact that the game even existed in any shape or form. The game allegedly was to be shown at E3 2005, 2006 and 2007 but obviously never appeared at any of the events.
After the game failed to materialise yet again at E3 2007 the game seemed dead and buried, that was until Metroid Prime 3: Corruption was released on the Wii. When in scan mode a terminal could be scanned that brought up the message; Experiment status report update. Metroid Project "Dread" is nearing the final stages of completion.
Due to this Nintendo denied that the game was in existence in any shape or form and that they were not making a 2D Metroid game at that time.
Since then Yoshio Sakamoto (one of the original games character designers and Director of all internally produced Metroid games) has been asked numerous times about information regarding the game and has always said that there were no plans to release the game soon, giving small indications that Metroid Dread did indeed exist.