We've discussed a few times if we see Young Sephiroth in the First Soldier Trailer. Well...
In this:
https://www.gamer.ne.jp/news/202207070001/
We get this:
野村氏: said:
現在はトレーラーでお見せしたオリジナル版「FFVII」と「CC FFVII」の作成をしていまして、トレーラーの最後に出てきた髪の短い若いセフィロスが、「FFVII FS」からのシーンになっています。
This is Nomura. The larger conversation is regarding his work and Ever Crisis. The last bit is what's interesting to me:
"トレーラーの最後に出てきた髪の短い若いセフィロスが、「FFVII FS」からのシーンになっています。"
This is referring to young Sephiroth that showed up in the end of the trailer. Right, we saw him at the end of the Ever Crisis Trailer, here:
We've had discussion about his design and his katana. (Single bladed, it isn't Souba, it has a sort of Shinra logo for the tsuba/crossguard). I and others have pointed out the similarities to this character seen in the First Soldier video:
The outfits looked similar to me (silver pauldrons, kinda standard Shinra uniform, and the short white hair. Many speculated when we first saw this, is it young Sephiroth?! As this thread has shown, the devs confirmed that this wasn't Young Sephiroth.
Then we get this quote. My understanding of this sentence is that we're told Young Sephiroth is from a scene in First Soldier. I can't say this is confirmed or they weren't being truthful or anything like that BUT, I do feel this points/suggests that White Haired SOLDIER candidate is Young Sephiroth.