There are more re-directs showing up, including an Electro Priest with the power to smash his way through tanks. This is looking more and more legit, as we see a lot more show up for it.
This looks like its not too far off. Perhaps Eldar and 9th Edition Fantasy, followed by Cult Mechanicus? So far I have not seen anything yet behind the scenes for Cult Mechanicus, but I have my eyes and ears open for something definitive... like units etc.
via Atia on Bolter and Chainsword
Codex: Cult Mechanicus
Datacards: Cult Mechanicus
Codex: Cult Mechanicus (eBook)
Codex: Cult Mechanicus (iPad)
we will get FULGURITE ELECTRO PRIESTS