What scientific quest seeks the successor theory to the Big Bang that can explain the true origin event?

Answer

Quantum Gravity

The search for a successful theory of Quantum Gravity is driven by the necessity to merge General Relativity and Quantum Mechanics to describe the initial singularity where current physics fails.

What scientific quest seeks the successor theory to the Big Bang that can explain the true origin event?
Originsciencetheoryuniversecosmology