If they were still standing at the end of "Ragnarok" Season 2, chances are good they're coming back for Season 3. Key characters such as Magne (David Stakston) and his half-brother Laurits (Jonas Strand Gravli), the modern-day incarnation of Loki, are definitely returning. You can also expect their newly discovered fellow gods, such as Iman (Danu Sunth), to return, as well as all the major human characters.
The Jutul family of apocalypse-happy, super-rich mythological giants are coming back, as well, though it looks like they'll have to do without their nominal patriarch, Vidar (Gísli Örn Garðarsson), who met a surprising end partway through Season 2. The powerful Saxa (Theresa Frostad Eggesbø) seems to side with Magne in the Season 2 finale, but Fjor (Herman Tømmeraas) and Ran (Synnøve Macody Lund) are very much in the villain game. With Laurits (at least briefly) in their corner, there's no telling what they're capable of.
There's no word on any new characters yet. Still, there are plenty more gods and their adversaries in the Norse mythology than "Ragnarok" has shown so far, and there's no telling just how many new ones the season has in store.
