So basically, your main issue is on wether or not the energy and the void are related to each other? (Since it's not explicitly shown where the energy went?)
If that's the case, i don't see how occam's razor doesn't solve this.
The question would essentially be "did this occur through natural means?" (i.e: the void)
If this isn't the case, then the question becomes "what else could have caused it?" The sequence of panels then gives us our answer (Energy gets thrown into space > explosion happens > void in space)
What's more simple to assume once you've eliminated the natural element? An unexplained, non-implied, and invisible mechanism (like it being caused by Blast's spatial bs, like people suggested in the other thread?) or inference based upon an understood fantastical element of the story?