That said, I'm like 99% certain Haru's [redacted] move is "undercooked" to show it off properly in the sequel. It only shows up right at the very, very end of the match, after all.

I mostly handwave it as DLC/sequel bait but we'll have to wait and see I guess.
Extended story list existing does imply there will be more, after all...

Presumably Kadoukai's silhouette is also smaller but does look more or less like him.