If you read the book "Revan" the quest line will resume with the Jedi knight...
If you play on the empire side, you can experience a questline with a cult dedicated to Revan on DK - However - this implies that Revan did a lot more on DK on either of his visits than the book would suggest.
My interpretation, based upon what I read in the book, is that Revan planted a seed. Particularly in Lord Scourge. The cult on DK likely grew from that seed.