Tsaritsa's Attack and Celestia's Plan

The Tsaritsa is on her way to kill the Celestia and so Celestia controls the two strongest archons, Raiden and Morax to plan an attack on Mondstadt. Will Barbatos come to save his nation? What side will Lumine choose, the Abyss or Teyvat?
Khaenri'ahn survivors join the abyss and plan to kill the archons, what will happen in the war?