Years later - I add on...
I postulate if a huge energy density - 10 ^ 80 Joules got teleported into our reality somehow, in near point form - say near Planck level dimensions 10 ^ -45 metres cubed - and it arrived near Saturn - what could a civilisation existing 14 billions years later postulate later about what conditions where like before the energy arrival event?
Chumly - I am pondering the case a mass influx of energy in an already populated universe - rather than was the singular creation event. Imagine if this somehow could happen - but it only rarely does - say once every 50 billion years. So yes if you lived 14 billion years later - anywhere within the blast radius of the energy influx event - I ponder it would look exactly like what we see today.
Today we can see out to a red shift of about 13 - so imagine a hubble sphere of 100 billion light years to the furtherst edges of the CMB. I don't think we have any model that can theorise what (if anything) is on the other side of the CMB's receding shock wave!
The Big Bang with inflation is used to most simply explain what we see today. It starts with a creation from nothing once there is a massive influx of very dense ultra high energy. I simply wondered how does the scenario change if "something" already existed - but that same high energy event occurred?