So let's say when Darth Bane died after he created the Rule of Two, he preserved his soul on Exegol and prepared an army. The remaining Sith would carry out his Dark Side plans until Palpatine comes into the Sith line. Palpatine becomes the Emperor and secretly, him and Plagueis got their ultimate plan from Bane, since he had centuries to plan. But eventually, Palpatine dies and the Empire is dissolved. So Bane gets Plagueis' DNA and tries to create Snoke, but the experiment goes slightly wrong. The First Order is formed from Imperial Remnants and children from before the First Order. When the First Order dominates enough of the Galaxy, Bane reveals himself. Basically, Episode 9 plays out but with Bane as the Sith (and less cringe). How's that as a thought?