[What happened to ue4?]

Unreal Engine 5 will come out but NCSoft still will remake game with UE4. The game is dying, NCSoft should consider to sell the game rights to rich game companies. Even with UE4, the game is not provide stable playability. In addition, the new graphics of the game are as same as old graphics.

Quote

Unreal Engine 5 will be available in preview in early 2021, and in full release late in 2021, supporting next-generation consoles, current-generation consoles, PC, Mac, iOS, and Android.  (https://www.unrealengine.com/en-US/blog/a-first-look-at-unreal-engine-5)