Finn: You were a spicerunner?
Poe Dameron: And you were a stormtrooper?
Rey: You were a spicerunner?
Poe Dameron: And you were a scavenger? C'mon, guys, we could do this all day.
Luke Skywalker: No one's ever really gone.
Luke Skywalker: The force will be with you.
Leia Organa: Always.
Poe: Somehow, Palpatine has returned.
Poe Dameron: What are you doing there, Threepio?
C-3PO: Taking one last look, sir. At my friends.
Palpatine: Your journey nears its end.
Rey: People keep telling me they know me. No one does.
Kylo Ren: But I do.
Luke Skywalker: We've passed on all we know. A thousand generations live in you now. But this is your fight.
Answer: It's a group of Sith cultists known as the Sith Eternal. They have been based on Exegol for many years.