Quote Originally Posted by Dragonface
Female Knight: Riku's older sister (who else that has the same hair AND eyes colour).
Bald evil guy: He's already a Heartless (He's wearing the same clothes as Xehanort's Heartless wearing)
Riku has light silver hair and green eyes. The girl in the video has blue hair and blue eyes. Also, the man wearing Xehanort's clothing doesn't have a Heartless symbol on his chest like Xehanort's Heartless did, and neither does his red sidekick.

Anyway, I'm not buying that any of the armored fighters are relatives of Sora, Riku, Kairi, or whoever. I think the secret ending merely hints that the next Kingdom Hearts could include Xehanort in some form, someone connected to Sora, and maybe a history lesson on the Keyblade(s).