When can we expect the mentioned "Sublevel Manager"? Will it be in 4.27?

I dunno about everyone else but the world composition window is clunky at best in my opinion, especially if your trying a very large open world space game, as it appears to be tuned towards large 2D terrains.

The new grid system for sub levels looks as if it will be tuned for 2D maps as well, unless its incomplete, I really hope we can add levels vertically as well…

Atleast the sublevels will all be connected in a nice easy to use blueprint style setup and will all be interconnected by default without having to play with the in editor movement arrows / location.

Anywho would love to know when its being released, any information would be great thanks.