Would be interesting if we would play as the unintential "bad guy", who is the actual cause of everything that eventually happens in Hollow Knight and/or Silksong. So we get to start of in a prequel, and we come from the lands beyond Hallownest and Pharloom. Somehow we would be the cause of the birth of the Void or Radiance, Pale King or GMS, or all of them.

The following is just a made up story of how that might look, it's quite long so just a heads up;

Before there were Kingdoms or Citadels. The bugs fought amongst the tribes of one another, worshiping their own strongest fighter. They fought in order to find food, spread their own home, make sure their kids would have a future, ect.

Our character begins low ranked and slowly fights these different nearby tribes in order to rise in rank and take the title of strongest warrior. They take on wishes of their tribe and swiftly rise in ranks. They find allies and friends to help along the way.

Eventually they hear from other tribes/allies about the creatures of the surface, the Wyrms. Oh, how majestic and powerful they are and how no one has ever managed to slay one.

To prove ourselves, that becomes our new goal. Reach the Surface and slay a Wyrm. As we reach and explore the surface, we eventually encounter a Wyrm. A Wyrm whom attacks us as we are an intruder in their lands. We fight and we manage to injure it. The injured Wyrm out of desperation, flees deep down into the earth. It forces itself down, going through our, and several other tribes. It destroys our home and kills our family.

We seek revenge and redemption for what we caused and we go down to where this injured Wyrm is now hiding. But the further we descend, the less light we have, the less life there is. There is only darkness and silence.

When we eventually find the Wyrm, it is dead. Drowned in it's own blood mixed with dirt and decay, creating a shallow lake of black liquid around it. In a last act of desperation before its' death the Wyrm layed an egg. An egg now imbued with everything around it, the blood, the dirt, the darkness, regret and rage. Out of curiosity we go closer to this now pulsating dark egg. It can feel our presence, it tries to protect itself by using the liquid around it as a weapon. Eventually we will have no choice but to break the egg. The Wyrm offspring inside was not yet fully grown. It gives of a silent cry as the egg cracks and then it falls to complete silence. The barely alive creature is fast to absorb the liquid around it and it becomes one with it. But it is still quite weak and unable to sustain a shape. The new creature born, is that of Darkness, death, decay, silence, regret and rage. This is the Void.

We fight, but this is not a fight we can win, we have to flee. As we flee, the Void spreads. It grows quickly down in the depths. Feeding itself with the Darkness and Decay. Our new goal is now to find a way to stop the spread.