Metroid Rebirth is a fanfic published by Dark Ridley, and the original version can also be seen on Fanfiction.Net, where he goes by the name "Spaceballs". It began in 01-16-08.
Metroid Rebirth takes place after Metroid Fusion in the Metroid series. The prologue describes the ending of the game Metroid Prime 3: Corruption, during which Samus has just defeated the corrupted Aurora unit 313 and Dark Samus, which results in Phaaze destabilizing and exploding.
Dark Samus survives this, and early on within the story is given what can be considered a "second chance", and as this occurs, the Space Pirates attempt to rebuild from the ruins of their organization, but must now deal from threats of others who are attempting to replace them. All awhile a shadowy figure has created a bounty on Samus Aran, and now bounty hunters from across the galaxy are preparing to hunt her down.