Over on the BGG forums, one person asked whether to resolve "When Revealed" texts when (a) using Eleanor's ability and (b) during the setup to Dol Guldur.
Nate French confirmed that Eleanor's replacement card DOES execute its When Revealed text, and the Objectives in Dol Guldur during setup are "attached", not "revealed", so that text would not trigger.
Here's the link to the BGG thread: http://boardgamegeek.com/thread/708411/no-for-dol-guldur-but-yes-for-eleanor
That should answer a few questions, I hope.