For reference, this is Palpatine’s plan in the original script pre-reshoots. According to the JediPaxis leaks.
After obtaining Vader’s device Kylo travels to the place specified by the wayfinder. It takes him to the Unknown Regions and a dead planet of flat, black rock. I previously reported that the planet where Kylo finds Vader’s wayfinder was called Exogol. Since then my understanding has evolved and I’ve been told that this planet actually bears that name. Kylo lands outside a giant cube, floating just above the ground and begins walking toward it. Kylo walks between the cube and the ground and once he reaches the center he discovers an elevator leading down below the planet’s surface. He follows the lift down and finds an old man, near death and lying in bed and being tended to by cloaked aids. My source believes these aids to be referred to as Sith Loyalists. The old man identifies himself as Darth Sideous. Kylo initially dismisses the old man, knowing that the Emperor had died over 30 years prior over the forest moon of Endor. Feeling that this must be a trick, Kylo claims that there must be some other explanation, such as this man being a clone. My sources specifically tell me that the Palpatine refutes the idea of him being a clone and affirms that he survived his fall. After his defeat at Endor, he left the known galaxy and traveled to the Unknown Regions to rebuild his Empire. Despite his skepticism, Palpatine begins to reel Kylo in and subsequently tells him of something known as a “Force Dyad”. The Force produces two incredibly strong users and when they unite together, both become stronger than either one could be on their own. Palpatine believes Kylo Ren and Rey to be the two halves of this dyad and shares this knowledge with Rey. (Note: I previously wrote that Palpatine wanted them to become “master and apprentice” since then this has been clarified to me as Palpatine seeking the two members of the Dyad) Palpatine claims that he seeks the Dyad because he is weak and dying and he wants the Dyad to rule together once he’s gone. Palpatine orders Kylo to bring Rey to him and turn her so that the Dyad will be a strong, unified force of darkness. Palpatine also reveals that he has been amassing an armada of Star Destroyers equipped with Death Star tech, each one capable of destroying a planet on its own. Generals Hux and Pryde are tasked with rounding up children in large numbers to train and staff his armada.