The First Order is the new order he’s talking about. He’s already part of it, and now he’s running it. He wants her to join him so they can run it together.
This. He’s the Supreme Leader now. How else would he stir shit up and rule the galaxy if he didn’t have an empire he was in control of?
But also this
Rey rejecting him, right? I thought that was pretty clear.
Rey’s rejection is definitely a set back. In a way it perhaps mirrors Anakin’s proposal to Padme to overthrow the Emperor and take over the galaxy. Once she says no, it takes a toll. Looks like this will likely be explored in TROS.