Side topic, I think I'd actually enjoy a more maturely-done exploration of Samus's character in a more grounded sense. I could see the storytelling team behind Spec Ops: The Line working well with her, especially since she has many parallels with Capt. Walker. A dispatch to the ruined Zebes to mop up Space Pirate resistance signals and as she ventures deeper into the terminally-damaged world. She fights ever-increasing odds, much like her experience in Super Metroid, her power growing more fierce and her brutality increasing as anger builds at having to clear this out the third time. Twist final boss would be the dessicated and decayed remains of Mother Brain, that Samus wants to fight. She wants it to be real, to justify her power, her 'mission'.
Maybe she doesn't make it off Zebes this time. Not because she was killed. Because she's home now in her own little world of hell.
Dark Samus and SA-X were just the negative elements of her personality given anthropormorphic form. Samus remains a killer at heart. She works alone, doesn't speak to her opponents, and utterly destroys them with little thought otherwise. She's stared too long into the abyss, and civilization holds nothing for her anymore. The one that groomed her is dead, the other one treats her as a weapon more than a person. A third one she exterminates whenever it dares to come to power.
