Board Thread:General Discussion/@comment-3221148-20180117165635/@comment-168424-20180118015256

TimeShade wrote: We're keeping it separate for now until there is actually a connection between the shows in-universe (we aren't counting that short)

Yeah, okay. I found this article which sort of explains it: https://www.cinemablend.com/television/1660609/is-black-lightning-part-of-the-arrow-verse-heres-what-the-cw-president-said