From the spoiled french Return to Mirkwood on BGG
Rumor of the Earth
Lore, Event, Cost 0
Reveal the first card from the encounter deck. Then you may pay a resource to return Rumor of the Earth in your hand.
First I thought its to have a peek of the encounter deck like Denethor/Riversong but then I realized "reveal" means put into play. Why someone should want to use a card/resource to increase the danger in the staging area? Sure, it could be used in conjunction with the neutral event coming in RtM (which puts the top discarded encounter card on top of the encounter deck) to get back lost objective cards, but this seems very situational.
Any other ideas?