Stories for Korean?
Will Duolingo ever be adding stories in Korean for the bonus content/lessons?
Eventually, maybe. But considering the fact that Duolingo Stories is only available for 4 languages thus far means that it's probably gonna take a while. In my opinion, a bigger priority for the Korean course would be to improve the tree / overall course.
Lots of stories with video and subtitles: https://jr.naver.com/story
Three Children Books read aloud: https://www.youtube.com/channel/UCxeA_yeJt2Nye9Dlldeo6Ng
Children Stories: https://www.youtube.com/watch?v=PwnquxWnO74