We are indeed on the hype train for 2019 as Legoland Windsor have amended plans for the Haunted House attraction that will indeed open in 2019, but not as previously thought Drop Towers.
Based on other Haunted House ride the Legoland Windsor one was set to be a series of drop towers, similar to the ones found across Merlin Dungeons, However this has no changed as it looks as though we will be a Madhouse replacing these in the original plans. The madhouse for those unsure is the same as Hex at Alton Towers