I don't think that's the case, though. He introduced the MF specifically to foster speculation. I seriously doubt he would devalue that effort with a reveal as obvious as this. That, coupled with the fact that he never specifically identifies Young Master Xehanort at any point is reason enough to consider that it might not be Young Master Xehanort we see in that screenshot.
Cue Chaser coming on and berating me about how it must be him because this that and the other. -headdesk-
i think this is gonna be the twist hes gonna give us. hes gonna give us an anticlamatic reveal (which he did) which is gonna lead to a shocking revelation in-game