What would evidence of a God even look like?

[Angrboda]

Yes, I follow.  That's consistent with relativity and standard big bang cosmology.  Please continue.

Excellent, I'll refer to that infinite singularity as the Infinite Unified State (or substance), the IUS. All material and forces are as one, occupying all space forever as a field of matter in equilibrium.

But before we unfold the infinite universes from this IUS, I'd like to point out that this is not a new scientific idea (prima materia) nor a new theological idea (Vishnu, the preserver is described having a body that is an infinite ocean, God in the bible described as an all consuming fire), nor a new philosophical idea as embodied by the "Chaos" of the Greeks.

The IUS is inherently "formless" as the is no external membrane or space beyond to define a form. Pure Being.

The question now is not "how do we get something from nothing" but "how do we get a 'nothing' vacuum space and ordered atomic creation in the midst of all this overwhelming "substantiveness"?

The classical answer is the expansion of space-time. What is your answer?