In anticipation for the Swain rework release, Riot Games is in the process of releasing three new origin stories for three Noxian champions. Katarina, LeBlanc, and Darius have all gotten new lore, and from what we've seen so far, Noxus is getting that much darker.
Katarina's story
These changes paint Noxus as less comically evil, as it was in earlier versions of the game, and more of a legitimate threat. This huge revamp could pave the way for future reworks to the lore.
Perhaps Demacia, Noxus' most fervent rival, could be next in line for a lore makeover.
Photo courtesy of Riot Games