The building that houses Van Helsing’s Factory was used from 1996 to 2004 for ‘Gremlins Invasion’, a dark ride featuring the creatures of the Gremlins franchise, as well as Alf. When Six Flags sold the park to StarParks in 2004, the park’s transited from Warner Bros. Movie World to Movie Park Germany for the 2005 season. The rights to the intellectual property of Warner Brothers were lost in this transition. The ride system of Gremins Invasion stood unused inside the building from 2005 until the start of the construction of Van Helsing’s Factory in 2010.
One of the props of the original Gremins Invasion ride, a puppet of Alf, is visible in the ride. You can spot him inside the crane at the last turn before the second lifthill.