In The Brave and the Bold #1, the main character is found amnesiac, on a beach by 10th century Scandinavian fishermen, who name him "Jon" after a legendary prince.
Jon reveals that he previously fell in love with a valkyrie, resulting in Odin banishing him from Valhalla and telling him that he could only return if he died a heroic death.
Subsequently, the Viking Prince appears in Justice League of America #159-160, a backup comic in "Arak, Son of Thunder", Birds of Prey #29, The War that Time Forgot (2008), The Judas Coin (2012), and The Odyssey of the Amazons.
[3][4][5] In Legends of the Dark Knight #35 (August 1992), Batman encounters Jon Rikkson, an environmental activist and descendant of the Prince.
[6] His spirit was later summoned to the present day by Hippolyta, where he was temporarily made an avatar of the Green (the force that connects all plant life on Earth and which gives Swamp Thing his powers).