So, Alton Towers has had quite a bit of activity lately. Nemesis is undergoing a major refurbishment, then we have Project Horizon piquing curiosity. However, those are looking to arrive in 2024 and 2025, respectively.
Now something else is brewing, something more recent and quite possibly it could arrive sometime this year. Apparently last year Duel: The Haunted House Strikes Back! closed, with signs that the house has been "REPOSSESED". And Merlin has confirmed they're changing it back to something closer to the original Haunted House, with a new story and effects, while also retaining many classic effects as well.