Redditor marisaann26 is convinced that in the end, Daenerys Targaryen will voluntarily choose to become the Night Queen. According to marisaann26 this final turn for Dany comes from a vision that she had in Season 2 of Game of Thrones.
Way back in Season 2, Daenerys had a vision where she walked into the destroyed throne room in Kings Landing. If you recall it was also snowing in this vision. As she reaches out to approach the Iron Throne, her dragons began weeping, so she turns away and ends up Beyond the Wall in a tent with Khal Drogo and their son Rhaego. Dany then leaves her family to find her dragons who are chained to a table. marisaann26 said that parts of this vision have already come true.
Dany going toward the throne but is drawn Beyond the Wall = when, in S7, Dany was going to go attack Kings Landing and take the throne by force, but she was told Jon and company Beyond the Wall need rescuing. Dany hearing the dragon cries = S7, the dragons crying Beyond the Wall after Viserion was killed by the NK [the Night King].
ccording to marisaann26, the Game of Thrones actors have hinted this is what might happen. They said,
In an interview with the actor that plays the NK, he said that 'we will learn WHO the Night King is after. In an interview with Emilia Clarke (Dany), she talks about the final season and said, 'It f*cked me up-knowing that is going to be a lasting flavor in someones mouth of what Daenerys is and that Dany is doing really weird stuff. One way or another, both living dragons will die in battle. Distraught by losing her dragons, Dany will be persuaded to join the Night King to be reunited with her dragons = she gets her ICE THRONE.
If this isnt enough to convince you, note that the music that played in Danys vision during Season 2 was the White Walkers theme music. Do you think the Mother of Dragons will become the Night Queen?