The series was intended to have five seasons, let it close its loop.

Said best by its own creator in an interview for The Wrap:

We had always planned on ending the series next season,” Joy told TheWrap during a recent interview. “You know, we always thought that ‘Westworld’ should kind of come full circle and back to the West. But with Dolores, who was just a player in other people’s games, finally getting to write her own. Just to close up a lot of the stuff that we’ve seen before like the flashforward with The Man in Black and everything, so we have a plan for Season 5 – but, you know, life can make other plans for you. So we’ll just hope for the best.”

Joy stressed that she and the “Westworld” team are strongly hoping for a renewal so they can finish out the story they first started with Season 1 back in 2016, adding that the endgame for the series – which we would see in Season 5 – was plotted out back when she and co-creator Jonathan Nolan were writing the pilot.