Re: Oldcrons vs Newcrons, I honestly don't hate the Newcron fluff. The Oldcrons, whilst cool, kinda trod on the Tyranids' toes (hooves?) in the "Faceless legions directed by an eldritch horror" territory. At least giving them the opportunity to have some actual personality is more than welcome IMO. Also IIRC the more recent fluff has suggested the bound C'tan shards might not be as bound as the 'crons had thought, for what that's worth. There's some old fluff I definitely prefer (specifically the Flayed Ones; I don't hate the new fluff for them but something about the old fluff with them trying to make themselves flesh and blood again by coating themselves in, well, just that is chilling) but on the whole I really don't mind the Newcrons.
How interesting is it to imagine a Necron Overlord obsessed with rebuilding his dynasty and empire, but secretly fearing the day the stars will be right again and the C'Tan shards will break their bonds, reassemble, and reclaim the Necrons as the slave race they really are? And being deathless, he will 'live' long enough to experience it. Or what about a Necron faction that has already fallen under the dominion of a powerful C'Tan shard?
If i remember correctly, it is the reason why in the new Lore, the Necron Overlord are very cautious with using the C'tan shards and only do so when all other options failed or would fail.
Many a Necron Overlord will suffer from some kind of insanity that will make him forgot that the C'tan shards in is possession are no mere weapons but fragments of godlike creatures. Those Overlord that still have their sanity intact, for their part, understand well enough that a C'tan shard is nothing else but a powerful prisonner who, if its chains are broken, will flee far away only to return one day to avenge itself upon his previous "masters". So, yes, i believe that more than one Necron Overlord rightfully fear the day when a C'tan will recover its full power and put the Necrons in chains, ones that they will never be able to break free.
As for a C'tan being in control of a Necron Dynasty, i think it is something that could be possible. I think that Deceiver could already be in control of many dynasty and cryptek conclave, and it would be quite an amusing thing to consider given the fact that it is him that allowed the Necrons to "enslave" the C'tan at the end of the War in Heavens...leading the Necrons to believe that they did enslaves all the Necrons, even the Deceiver, while in fact, it would have been the Deceiver's plans all along.
Given the fact that some Necrons named characters, notably, Szeras and Orikan, have plans to "evolve" and become true Gods, so to become C'tan, i do believe that in the same way, all the Necrons Lore is in fact the story of the C'tan Deceiver to become the Supreme Ruler of his kind.
After all, when you consider the Deceiver depiction :
- It is "he" who assumed very early the role of "messenger" between the uncaring Star Gods (the C'tans) and the Necrontyr
- It is "he" who suggested the Necrontyr to become mechanical construct in order to fight and win the War in Heaven (and perhaps even "orchestrated" the War in Heaven...)
- It is "he" who turned the C'tans against one another, reducing their number greatly
- And perhaps it may be him who created the "God-Killer" weapon the Necrons used against the surviving C'tans at the end of the War.
One can only imagine that the Deceiver willingly orchestrated his "enslavement", tricking the Necrons with the believe that they were the masters of their own fate, while in fact they were playing the Deceiver's game all along. Now, if the Deceiver is truly free, with most if not all his fellow C'tan enslaved or broken, the Deceiver may be the most powerful C'tan in the Galaxy, and i think his plans only start to unfold.
Also, one important question remain....What if Tzeentch, Cegorach and the Deceiver were, in the end, only one being....different words for the same things....(That's an "Inception" level of IQ.^^)