In Bloodmoon, someone mentioned the events of Oblivion. http://www.uesp.net/wiki/Bloodmoon:Easter_Eggs#The_Prophecy_of_Oddfrid_White-Lip it is.
Hmm.. Never found that quest :shrug: nice, though.
Most of the things people talk about in Oblivion is just to refer to lore, since there is hardly any other references outside books, that a lot of players don't read.
Just what I think. And I doubt the warring nords would have something to do with TESV, because they're warring with the Dunmer, which can't happen when TESV takes place, because of the stuff that happened in Infernal City.