[Spoilers] The Patch 4.2 Discussion and Speculation Thread!

[Rocl]

I fully expect Byakko and the rest of the Lords to be some kind of deiform. It looks like a rock in Hell's Lid behind the turtle grandpa boss is covered in omamori. https://en.wikipedia.org/wiki/Omamori
Which seem to indicate some kind of spiritual malarkey is happening. Like the stormblood primals thus I expect something out of the ordinary. The black/red aura he utilizes is reminiscent of two things to me immediately: voidsent and Ame-no-Habakiri. He is likely to be an exceptionally powerful kami, and given everything we know about kami thus far--they're analogous to Eorzean elementals and primals. Byakko's dialogue in the trailer is also interesting...
"Receive of me my fury, children of man, and quell it." "There is no turning back." For some reason neither of these strike me as particularly aggressive. It almost sounds to me like we're performing some kind of mercy, killing Byakko. The voiced dialogue as a whole is curious in the trailer, we even appear to have Nero speaking "SHOW US WHAT YOU CAN DO" which is ... odd to the say least. No other raid has gotten voice acting before! I'd almost believe this isn't Nero, but the other languages seem to have the weird tin-can effect that's reminiscent of Garlean helmets.

I also agree with Berethos that the dialogue played over Krile sounds a lot more like Yugiri than our Sharlayan Lalafell, but shrug. It would be the only time in the trailer they aren't showing the character as the dialogue plays. I also suspect that we won't be comparing Fordola to Yotsuyu's crimes so much as Gosetsu's to Yotsuyu. I also agree with unknown elk here that I think, eventually, we're going to learn Nero was "stay puft"-ing us the whole time. While we got a whole patch of Ala Mhigo in 4.1... I can't help but hope for some glimpses to what Raubahn and Fordola are up to during 4.2.