I would not attach too much importance to this flight. It may or may not come to anything. Despite the marketing, it is based on demand and as likely as not the flight will operate via another UK hub such as MAN. Historically adverts for flights to access Carribbean cruise holidays from the North East, where they are not linked to sheduled flights via LHR or where ever, end up as block bookings on UK IT flights that are already operating.
DTVAirport
Aren't they offering a similar package from LBA
says it all !