i found something about samus' timeline if it matters at all
Samus Aran, still a helpless infant, is orphaned after she becomes the sole survivor of a Space Pirate raid on her home planet of K-2L. A group of Chozo find Samus and take her back to their home on the planet Zebes.
Samus grows up among the Chozo, is trained as a warrior, infused with Chozo blood and given a Chozo made power suit.
The Space Pirates invade Zebes, killing the indigenous Chozo and setting up a base of operations there. It is likely that Samus has already left the Chozo or escaped during the Pirate invasion.
Galactic Federation discovers Metroid on the surface of SR-388. The ship transporting the Metroid to Federation science labs for study is attacked by Space Pirates who capture the Metroid and take it to Zebes.
Federation attempts to stop Pirates from cloning the Metroid fail. As such they hire a bounty hunter named Samus Aran to destroy the Space Pirates and the Metroid.
Samus penetrates Zebes, killing Space Pirate leaders Kraid, Ridley and Mother Brain as well as the captured Metroid and its clones. As she escapes her ship is shot down by Space Pirate patrols.
Samus, now with no ship or Chozo power suit, infiltrates a landed Space Pirate Frigate on Zebes and nearby Chozo ruins. She finds a new Chozo suit and commandeers a Space Pirate ship, escaping from Zebes.
The Space Pirates split into two groups, one to rebuild their base on Zebes, the other to find a new power source. They discover an element on the planet Tallon IV known as Phazon and begin genetic experiments with it.
To prevent the Pirates from breaching their cipher, the Chozo Ghosts who remain sane spread the 12 artifacts across Tallon IV.
Samus tracks the Space Pirates to Tallon IV and disrupts their operations. She finds the 12 artifacts and opens the seal to the impact crater. Within she seemingly destroys what the Pirates had named Metroid Prime, the source of Phazon on Tallon IV.
Data concerning events on Planet Aether yet to be declassified
Federation deems Metroids an unsafe life form and hire Samus to systematically eradicate the Metroid population on their home planet SR-388.
Samus is witness to the many stages of evolution the Metroids undertake in their own natural environment. In the deepest part of SR-388 Samus encounters the Metroid Queen and terminates it.
Samus witnesses the hatching of the final Metroid egg. The hatchling sees Samus and bonds to her like an infant to its mother. As she escapes the planet, she takes the Metroid hatchling with her.
Samus delivers the hatchling to Ceres Research Colony. The scientists make amazing discoveries about the Metroid and extract a copy of its DNA, sending it to the Federation.
Satisfied, Samus leaves Ceres, only to return shortly when the station sends out a distress signal. Ridley captures the Metroid Hatchling and takes it to Zebes. Samus gives chase.
Samus terminates Pirate life forms Kraid, Ridley, Phantoon and Draygon, gaining access to the Mother Brain’s lair: Tourian.
Mother Brain is about to eliminate Samus when the Metroid Hatchling protects its “mother” and is killed by a blast from Mother Brain. Samus destroys the Mother Brain and escapes Zebes before it’s destroyed by the Pirate’s self-destruct mechanism.