Das Ende lässt sehr viel offen und hat mich mit nem Fragezeichen im Kopf stehen lassen.
Ist Yama in Wirklichkeit ein junger Harlock?
Besonders mit dieser Theorie die ich bei Reddit gefunden habe ergibt das ganze sehr viel Sinn.
So my theory is that Yama is actually a young Harlock... bare with me here:
Harlock is caught in a time loop that ends with him activating the 100 detonators that resets the loop. Here is how it works...
When the Arcadia changes and bursts out of the earth during the scenes of Harlocks past that is actually the young him. Hes just come from the future here
He goes about his adventures deploying the detonators.
He flies to the specific planet to recruit his younger self (He's older here).
(Normally) he activates the detonators and dies letting his younger self (Yama/Logan) replace him as Captain Harlock and we go back to step 1.
Because he didn't activate the detonators this time he doesn't die but still lets himself get replaced which is why there is two of him.
He released the Dark Matter as it was part of his loop however with no detonators active the loop is broken.
The crew get reset when they die believing Yama to be Harlock having no memory of what just happened.