There seem to be a number of articles today suggesting the video is an advert which has been banned from being shown on TV over the Christmas weekend, including this one from ITV
. I imagine this is a PR stunt type thing rather than a formal ban as the video doesn't appear to be of TV commercial quality.
The new destination is also now being advertised on the Thorpe Breaks website
, which, among content which has been seen previously, also features this new paragraph giving an indication of what's to come:
Unleashed from the dark are unseen characters, thrilling physical effects and more intense live action.
The 'unseen characters' are presumably the remaining VR journeys and possibly the other ending, 'physical effects' could refer to some of the features we know the train has but are yet to be utilised (e.g. self-steaming windows, leg ticklers) as well as potentially the extension to the end of the experience, whilst 'more intense live action' would suggest the addition of another live scene, which would logically form part of the extension to the attraction.