Archeage! Trion's (Creator of RIFT) new project!
The games been in development for about 3 years now but I've only learned of it recently. It's made by a different korean studio but being published in North America by Trion! It's entering Closed Beta 2 on Wednesday and I got in! It looks like an awesome game. They're trying to make it as open world, and as much of a sandbox as possible. Want to start trade routes? Sure. Want to guard cargo with 50 other players protecting it from a guild of outlaws? Okay! Sail around the world? Raise your own mount? Naval combat? Mounted combat? There's pretty much everything you could want to do!
Here's a link to the site where you're open to opt-in for future betas. They plan on doing quite a few more and finish with an open beta as launch is still planned before the end of 2014.
Oh, did I mention it's Free to Play? And there's no NDA either! I'll be keeping plenty of Shadowplay footage I'm sure haha. It really does look like an amazing game.