User blog comment:DirgeOfCerberus111/Alternate Time-lines?/@comment-1986435-20110807090445/@comment-10514705-20110807203754

I don't think so, as I gather NCF is supposed to be used in order to brand articles which contradict the canon while having an association with canonical pieces. An alternate timeline is almost completely separate from the established canon, so it would require a separate tag. As I'm not a mod, this is all speculation on my behalf.