I am of the opinion that it was not so much a ‘big bang’ creation moment as it was a phase shift to what God has created for those who are in Christ. The realm already existed, Jesus merely left ‘here’ and stepped into ‘there’. He stepped back and forth for forty days following that first step, too. I happen to believe the Christophanies occurred during that forty days before His ascension.
Yes, which is why I treat it as an interesting hypothesis to be looked into, but not a terrible disappointment if it does not pan out. “Test everything; cling to the good; avoid every form of evil.”