alrighty... time to see if anyone else has wondered this.
the war between the c'tan and the old ones is sometimes called "the war in heaven", but this is already given to the battle from eldar mythology of a war between the eldar gods over the treatment of some of them, BUT i've also heard of the Fall being part of the war in heaven as the final act of the eldar gods (perhaps someone with a more intimate knowledge of eldar & necron fluff could assist here).
in the war between the C'tan and the old ones, the deceiver tricked some of the c'tan (eg. the nightbringer) into eating other c'tan. the deceiver's nefarious ways are very much apart of its character. it loves to playing with mortals and will often disguise itself to increase the pleasure it receives from its games. the necron codex states that the deceiver was the last C'tan to go into stasis, but fails to give a somewhat accurate date.
At the time of the Eldar's Fall, all but two eldar gods were destroyed, khaine & cegorach[sp?], the laughing god. khaine fought slaanesh and was defeated, his body broken, which lead to the forming the avatars. meanwhile, cegorach disappeared into the webway, where he went into hiding, and where he supposedly is still today, his followers being of course the harlequins. Cegorach is a trickster in true form, no one knows what he looks like, the only likely appearance could be taken from his followers. Cegorach draws his power from (i'm guessing on the gender here)his cunning, disguise, and illusion. Sound like anyone we know?
so know we get to the question. could the deceiver and Cegorach be one and the same? both share characteristics with one another, and both hope to end chaos, so it doesn't seem impossible that this could be true, despite other evidence (timeline). or could Cegorach and the deceiver be playing games with each other by dressing up as one another to determine who is the greatest trickster and mastermind in the universe, while Tzeenech sits on the sidelines eating mutated popcorn?
so am i mistaken or am i on to something? what are your thoughts on this possible necron/eldar conspiracy?