Are we going back to the Second Age?

[Macbeth]

So I was reading the announcement about the upcoming Minas Morgul expansion, and I saw this:

"The words of the shade of Isildur will unearth secrets and visions of the Second Age that have remained untold until now, revealing playable landscape and new adventures from a crucial time in Middle-earth’s history."

I haven't been following the development/news of this expansion too closely, so now I'm wondering: does this mean we'll be travelling back to the Second Age somehow, or does it refer to session play raids/instances, or just places where major events of the Second Age took place?

Inquiring minds want to know.