There’s a theory that Malivore was posing as Landon when they returned from the prison world, which while gross, could become another big storyline should Landon return to the real world once again.
Of course, Malivore returning as Landon once again leaves the question of whether Landon is alive or not, which would bring us full circle yet again.
Things may heat up soon though because Legacies conveniently did all it could not to acknowledge the fact that Landon struck some kind of deal with his father Malivore back in the prior episode.