Does anyone have a link to where BW talked about the original KOTET finale?

I remember reading a while ago that it was meant to involve Revan, Marr and Satele so I want to check that just for the sake of curiosity.

They appear indirectly through gameplay

When KOTET first came out they initially had Revan's spirit enter the Outlander's body during the finale when you used the dark side of the Holocron but Bioware eventually removed it for some reason.

Before removal:
https://www.youtube.com/watch?v=9JigornQNeE

After removal:
https://youtu.be/cVbVgQeDc7I?t=3013

Instead of Revan's sabers appearing in the protags hands they just use their fists.

That's pretty awesome, thanks. Would have been nice to see Revan team up with the Outlander and the two of them fight Valk alongside Vaylin and Arcann, even if only to get their arses kicked.