Two months ago? How did it take me so long to find this?
Up to our eyeballs in death (or dying heroes) - yet there is more to it:

Spirits are next to me. I can't see
them but unmistakable
the feeling of their presence.

Well, that's something!
So, these spirits might accumulate to the point of creating black holes?

is it possible for the world
to fill with the souls of the dead?
Maybe that's when the singularity will occur
and the black hole will swallow
our galaxy and spit it out

Given the lightyears apart that stars and planets are, and the staggering smallness of humans, who are like grains of sand on the beach, I'm not concerned that billions of dead people could cause a black hole, but it is certainly fun to imagine such things.

Now I have that song "Black Hole Sun" by Sound Garden playing in my head.