One of the most hotly debated questions among "Game of Thrones" fans is whether or not Kit Harington will reprise his role as Jon Snow in Season 6 of the HBO series. One theory suggesting his return has to do with the notion that the color of Snow's eyes changed in the final episode of Season 5. [Spoiler alert!]

There are multiple theories about why Snow could be back next season. The theories range from him being resurrected by Melisandre (Carice Van Houten) to him warging into a direwolf. Dan Selcke of Winter Is Coming examines the fan theories associated with the supposed change in eye color, which happens after Snow gets killed by members of the Night’s Watch.

Some fans have noted that just as Snow lies on the ground and the camera zooms in on his face, his eyes change color. Fans suggest this could mean he could warg into a direwolf, change into a wight -- or his true identity as the son of Rhaegar Targaryen and Lyanna Stark will be revealed.

Selcke notes that eyes change color when a person wargs or when a dead person rises as part of the army of the White Walkers. However, he believes that Jon’s eyes changed color because of the camera angle. He explains that Jon’s eyes neither turn “milky white,” as in the case of warging, nor do they turn “ice blue” like the members of the army of the dead.

Robert Fruin at Spoiler TV predicts that Jon will eventually be resurrected, but it might not happen in Season 6. He expects the army of the White Walkers will cross the Wall first and that Jon may not return until the show's final season.

Fruin also speculates about what might happen to some of the other characters in Season 6. He expects that Brienne of Tarth (Gwendoline Christie) will get to meet Sansa (Sophie Turner) again, as this is her only purpose in life at the moment. He also expects Kevan Lannister (Ian Gelder) and Maester Pycelle (Julian Glover) to die at the hands of Cersei (Lena Headey) and points out that Varys (Conleth Hill) is in Meereen and may not be involved in the killing.