One Boruto fan on YouTube, @c, theorized that Kaguya Otsutsuki might end up being revealed as the daughter of Shibai, the Otsutsuki God. This might be why she was labeled as the Rabbit Princess.

The Otsutsuki always travel in pairs, and when the Otsutsuki came to Earth, it was Isshiki and Kaguya. For the sapling to bloom into a God Tree, an Otsutsuki must be sacrificed. Kaguya was meant ...

However, Kaguya Otsutsuki unexpectedly used Madara as ... In the war, Madara was a god-tier battler as he nerfed down the hokage alliance single-handedly. Furthermore, he also fought against ...