(2/3) The scenario is based on nothing but the series prologue and the assumption that Kawaki eventually goes rogue.
(3/3) The premise is that Kawaki's first target to dismantle the shinobi world is the most senior and experienced Kage of the Shinobi Union (explanation/thoughts cont. in replies)
Temari smacked her brother for suggesting that Shikadai not maintain the Nara Hairline