Well this came out of nowhere. Nintendo just announced Metroid: Samus Returns for 3DS, coming September 15th. It looks like an honest-to-god remaster/remake of Metroid II: Return of Samus for the Game Boy, which is an important game in the canon but really hasn't aged well. Needless to say I'm incredibly excited about this, but it also explains why Nintendo slapped a cease-and-desist order on the fantastic AM2R: Return of Samus fangame, which had been in development for a decade.
