According to Korean media, the Korean company XL Games is currently working on a mysterious new title Project X4. They are recruiting developers at the moment.
"Kakao Games and XLGAMES are today very happy and thrilled to announce the arrival of ArcheAge’s Summer Update, which is available for players to enjoy now." - Kakao Games and XLGAMES.
"It is with great excitement that Kakao Games and XLGames announce ArcheAge’s first content update of 2023. The Spring Update will include a wealth of improvements and reworking of in-game features, engineered by the development team to continue enhancing player experience." - Kakao Games and XLGames.
"Following the positive response to ArcheAge: Unchained’s previous Fresh Start Server, Kakao Games and XLGAMES are delighted to announce the launch of an all-new Fresh Start Server for the beloved MMO title.
The new server will be accessible to ArcheAge: Unchained players on February 9 and will include a host of new improvements to server specifications based on user feedback." - Kakao Games and XLGAMES.