Elyon has launched in S. Korea (It launched on Dec.10th). The game is B2P with a cash shop. It's pretty much vanilla Aion with Tera combat. The grind is insane. Also bluehole is coming out with zany costumes and mounts. Just like it does with Tera. So if your into immersion, you wont' like that.
The western version is suppose to launch Q2 in 2021. But I am sure it will be delayed till the end of 2021. They do have a new western website to check out.
https://elyon.playkakaogames.com/