This may come as unwelcome news to some but Merlin really dont care much for what enthusiasts know. To such an extent that we are mocked in the offices at Merlin HQ in Poole. Even if construction started before the end of the season, it takes an enthusiast to scrutinise photos and speculate about what will be, the general public just see a construction site. The towers arnt at a loss from us knowing the secret, we are loyal and will visit no matter what, having it revealed to the mass public however limits the abilities of the marketing department because it prevents hype and hype brings guests. The use of shipping containers in many Merlin attractions are a running joke for the financial department at Merlin because they are so cheap and make enthusiasts so angry yet the general public really dont notice or even care. SW7 will use a shipping container. I dont know if this appears on the plans or not, if not then that certainly suggests potential changes to other aspects of the plans such as layout etc.
The decision to take down a lot of the Fanta theming in X-Sector seemed to spring from the opposition of people in this forum, with a kindly worded letter from the Towers however, whilst this may have contributed to the decision, it came from a certain person at Merlin whos objection alone to the obtrusive nature of the theming was enough to have it taken down.
In order to speculate on more likely results, its important to think of Alton Towers as a business. As enthusiats we know a lot about coasters from all over the world so we know what is possible so we expect more. What we consider to be gimmicks, are what gets the general public buzzing.