Lore Question for a Noob.

So from what I underatand WoW Forever is essentially an alternate timeline where the dark portal doesnt open and causing the expansions to go down. But what about Arthas? What is the Lich King up to? Isnt he a big threat? At some point shouldnt the world be worried about him? Will we see some sort of reimagined Wrath of the Lich King expansion to WoW F? I was never around for that expansion and I thought itd be so cool to experience it as a new reimagined experience.