Picked up the new pack at GC Friday, thumbed through the cards, and celebrated the arrival of Haldir - the answer to a long-time challenge my wife and I have had in our hero distribution choices. It's complicated to explain so I will save that for the thread in the strategy section where my decks are posted.
I didn't realize the full power of the card, but my wife did. We had to read the card six or seven times to make sure we weren't missing anything.
As long as you don't engage an enemy, you can attack any enemy you are not engaged with. Any enemy. To me, upon initial reading, I made the presumption that I would pull enemies and block with Denethor and then Haldir could attack with Legolas to my side of the table, or perhaps Haldir would kill them before Denethor needed to block.
My wife targeted enemies in the staging area. I can't see any indication that she was wrong in doing so. Did we miss something?