On the wall in the castle there are several paintings of elder vampires including a rendering of Vlad the Impaler, also known as Dracula.
It was originally thought that this was Kate Beckinsale's last movie playing the character Selene, but Len Wiseman has confirmed a sixth movie is in development with Beckinsale reprising her character.
Peter Andersson's character is called "Vidar", which is the modern Swedish form of the Old Norse god "Vithar". In Norse mythology, Vithar is the son of Odin and destined to kill the monstrous wolf Fenrir at Ragnarök. The naming is therefore an obvious allusion to Vidar's role in the film as an enemy of the lycans.
Kate Beckinsale stated in an interview that the idea of female Lycans came from director Anna Foerster and joked the reason why there had never been female Lycans in the prior films was because "other directors were scared that 'they might be ugly'."
While previous entries in the series had a distinctly eastern European flavor to them, this film has Scandinavian touches with a Nordic vampire coven and characters with names like "Marius", "Lena" and "Vidar" which are very popular in Norway and Sweden.