It's a very suggestive theory. Here's some food for thought.
From the Star Guardian event intro:
In the beginning of all things, the First Star gave its light to create the universe. New worlds were born—and with them, warriors imbued with the light of the First Star. These protectors are supernovas blazing bright, yet destined to collapse as furiously as they burn.
They are the Star Guardians.
From a quick internet search on supernovae:
Stars greater than 1.4 times the mass of the Sun (called the Chandrasekhar limit after the Indian physicist who discovered it on his way to England) will tend to explode in a supernova casting off much of their mass. A small central core will remain and like smaller stars this will collapse only this time electron degeneracy will not be enough to support the star's mass against its gravitational collapse and it will continue to shrink until it becomes a tiny, but hugely massive, neutron star held together by neutron degeneracy.
If neutron degeneracy is not enough to resist the star's collapse it will continue to shrink until the matter is all compressed into an infinitely small, infinitely dense point called a singularity. This is the centre of a black hole.
Light and dark, creation and destruction, beginning and end. One cannot exist without the other. The primordial First Star that generated the universe with its light created the darkness that will bring forth Oblivion, to end disparity and return all things to One.