This seems to be the new Korean ARGMMO people want to come over to the west. From what I've seen and read about the little info there is, it seems to be shaping up awesome. I'm not the biggest ARPG fan, but I do play them from time to time.
What really has be interested is the HUGE emphasis the devs have on Open World Content.
"Last but not least, Lost Ark is not a dungeon-based game. It stresses on open world adventure." The world will be really huge, according to Ji Won-gil."
We probably won't see this game in the west for at least 2 years, but here's hoping it turns out well.