Not sure if it's on YT somewhere, but this is a pretty interesting PV. X being "born in ashes" is one hell of a hint. It's also way more somber than his other trailers.

>PV2: What Makes a Hero
>Where heroes rise
>Where commoners shine
>Born in ashes
>Heroes I shall redefine

https://www.bilibili.com/bangumi/play/ep775863?from_spmid=666.25.episode.0