We seem to have the answer to what the teaser was for:
As posted on SouthParks social media
, it’s been confirmed that The Luna Cinema will be coming to Thorpe Park during the May Bank Holiday weekend (25th and 26th), with showings of Back to the Future and Bohemian Rhapsody.
With doors opening at 7pm, there will be the opportunity for guests to enjoy rides on Stealth, Storm in a Teacup, Detonator: Bombs Away, and King Pig’s Wild Hog Dodgems, before the screening begins at 9pm.
General Admission tickets are priced at £27.50, but guests wanting a seat provided will need to purchase a Seated Admission ticket for £35. It seems backrests and blankets are also upcharge, at a price of £15 and £12 respectively.
More details and tickets are available here