Ninjago: Civil War
Following the defeat of the Sons of Garmadon, and the second redemption of Lord Garmadon, Ninjago City is forced to, yet again, rebuild. This time, they have to undo Garmadon's total domination, for which he is being tried for, and put to life in Kryptarium Prision.
Lloyd opposes this, and says that his father was under teh influence of the Oni Masks, and therefore should not be tried. The Ninja get into a fued, and they split into two groups. One group that opposes Garmadon being tried and imprisioned (Jay, Lloyd, and Kai) and the group that supports it (Nya, Zane, and Cole.) Other Characters like Master Wu and Misako differ between sides (specifically, thoses two are on team Jay)
This season focuses on the war between the two sides, and the dilemma of Jay and Nya's relationship crumbling because of this conflict. It turns out later in the season that Nadakhan the Djinn orchestrated all of this, only to ruin Jay's life (By splitting his friends in half, and taking Nya from him.)
This story is based off the story on The Ninjago Wiki. This was someone's idea of what Ninjago season 10 ideas of what was to happen in 10. As we can see, that never actually happened. Though the ideas are not mine, but, I am trying to rewrite the story in more detail as it only has details for episodes.