system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] The Earth is trapped in a cosmic bubble: no one in, no one out. Human, Mutant and Inhuman kind can no longer reproduce. In 10,000 years, who are the last beings alive?
gpt
Mutants and Inhumans have the potential for immortality, humans don't.

At least a few of them will make it into the third century after the bubble.

After that, it's a big Earth, full of the corpses of several civilizations. Those that won't fall to mortality only really have one foe, and that is each other. Mutants are mostly phobic of war and struggle and will likely seek peace in what to them will be a utopia, the greatest dreams of Genosha writ large. That is, until Apocalypse decides he is to be the arbiter. Eventually he will rule, even if it is over an empire of one. 

The Inhumans have always had a regal structure, and the current Regent will direct the Inhumans in much the way that they have over the last 10,000 years. With few pressures upon them and no concerns over territory or resources, the Inhuman civilization will be much like it was before, reclusive in their hidden city, with dissidents free to re-locate to areas of their own making.

It is when Apocalypse's minions meet with the Inhumans that En Sabah Nur will see new vistas to conquer and a new race to enslave. The Inhumans will find that awfully disagreeable, and it is that which will lead to the bloodshed that one way or the other, will settle the issue finally.

This assumes the Eternals or Deviants do not decide to simply relieve themselves of the pesky remains of the Homo genus entirely and take the world back for themselves.