I've read this over from the beginning... (I find all of the information presented highly relevant to my '1-of-12' adventure project. Which deals specifically with 'elder god' types trapped in another dimension. influencing humanity)... and, I find... (discussions of quantum dimensional theoretics aside)... that there is very little that actually affects gameplay. Well, 'directly', anyways.
I understand that you are essentially 'field-testing' the background material. But, I don't see where any 'logic incongruities' might prevent these ideas from taking hold. As, we have to 'suspend disbelief' quite a bit anyways, to be able to thoroughly enjoy the idea of 'superheroics', to begin with.
My point is this, even if someone could point out a flaw in this idea... its just background material. As GMs we ALL tend to add and discard whatever fits out tastes anyways. (The Galactor/Spectra exist in MY gaming universe. Zairob does not.)
Frankly, I like your idea. But, I THINK it might be a bit 'too constrictive'... for SOME scenarios. For instance, in my adventure there are indeed 'alternate dimensions'. (Grouped together by the commonalities of the physical laws, and the most accessible means to gain entry into them. Ie.- There are magical dimensions, sub-dimensions, hyperspace, parallel dimensions, divergent dimensions, and alien dimensions.) Each with it's own set of rules and 'FLAVORING'. These rules between my dimensions tend to VARY greatly,... BY dimension. (The physical laws of my Asgard are drastically different from the sub-dimension I call 'the Blue'. A sub-dimension where 'physicality' in the universe never came to be, but 'consciousness' does exist.) I think that by setting an 'overall' guideline for ... um... 'dimensional behaviour' you might be cheating yourself of some of the versatility availalble for 'the creation of 'game settings'. (Lets be honest, whether its a new dimension, another planet, or another era in time... it all means the same thing for us GMS. Its a 'different setting'.)
Still I think you have the fundamentals of a great idea on how magic might work. (By casting a duplication spell... I would not be manipulating universal energies to 'assemble' a duplicate of someone out of ambient atoms. I would instead be manipulating them to cause a 'temporal stutter'... which would last long enough to cause another (perpetual) 'instance' of that being. In my mind, THAT sounds more like HOW magic should work.
That works for me.
But, it might not work for everyone. I suppose it would be specifically dependent on how greatly 'overriding' elements of my adventure, were impacted by these ideas. (Say, that Christians who were killed in battle could not just 'show up' in Valhalla, because my scenario was very specific about who could and who could not get into Valhalla, to limit my PC group in some way.)
From reading your very first post, two other questions present themselves to me...
1)Is the actual 'kingdom of Heaven', an intended game setting in the V&V universe. (I cant stop my players from starting a heated gunbattle in the middle of the Vatican. I can only guess what would happen if they were somehow put in front of HIM and the Archangels.)
2)Are you also stating that the existence of gods (including HIM) and demons (including 'mih') and their respective realms, is considered to be a 'SCIENTIFICALLY PROVEN' fact, in the official V&V universe? (Thor has been a staple of the Marvel universe for decades. People like Reed Richards and Dr. Strange *HAVE* to acknowledge their existence and the existence of the universes they come from. Because the proof is NOT empirical... its standing right in front of them. But, by and large, most scientists in the Marvel universe do not believe in 'other dimensions' and 'godhood'. (Or even 'aliens', for that matter.) If anything, they probably still view them in much the same light that the 'common man 'does... as 'unknowable truths'. A general disposition that serves ALL readers, by accommodating ALL of their personal viewpoints, by specifically being vague.) Are you sure that your approach is the best approach to take, regarding this subject matter?
Other than that, I don't see anything wrong with your idea. (In fact, i'd even add, that it goes quite a ways to explain how PC superheroes never seem to 'really' die, somewhat.)