Not only is Loki the parent of Fenrir, Loki also has Jörmungandr and Sleipnir, Óðinn's horse, as kids. So I wonder if the Jörmungandr from the 2018 game got sent back in time from the future, or if they ignore all of this. He's supposed to play a big part in the Norse Ragnarök after all, let's see how the game version is gonna play out