During that fight, the Sentry was brutally ripped apart by the symbiote god, who absorbed the Void into himself. In the aftermath, Jane Foster carried Reynolds' soul to Valhalla.

The Empty Void Vs God. In fighting against one of the world’s greatest heroes, Blast, ... “At that time, Void, who had absorbed the power that leaked from Garou, ...

One-Punch Man chapter #208 has finally gotten back to the battle against Empty Void after taking several chapters off to introduce the Neo Heroes, and things aren't looking so good for the heroes ...

So, basically, despite there being a 15-year gap between Empty Void having his true sense of self, his goal remained the same, i.e., to defeat God.