Hooded Figure Before Twilight Thorn??

[Smile]

Before Sora fought Darkside, he saw himself as a shadow.
Roxas has an awakening that parallels Sora's (stained glass platforms, mysterious voices). It stands to reason that the flash of the Nobody before Twilight Thorn appears is a reference to the part where Sora sees himself in darkness before Darkside appears.

Get it?

Yeah, only then we got Days that throws a spin at the whole thing.
Xion's Memories fell into the Darkness in Sora's Heart. I'd call that reasonable enough basis for her to be tied to their "Darkness"