So this webtoon is finally ending. The desert unification arc has dragged too long. A somewhat open ending after the war is maybe the best way to finish this.
Probably for the best that it just end already, this manga got lost in the weeds a long time ago. Hopefully they take enough time to get things properly worked out for any spinoff.
Yeah my assumption based on his comments is the potential spinoff/sequel will about the seals. Since the entire journey of Red Storm was Yulian from a child who wanted to avenge his mother/unify the desert to finally accomplishing both goals as a young(?) adult.