So ahead of tomorrow in which I expect some reveal I watched the original 1973 version of The Wicker Man. Obviously, it's almost pretty certain Wicker Man will be the name of this attraction and in terms of every other attraction in the world, this at Alton Towers will be globally unique.
These are simply some comparisons I've found, do note however in paganism/festivals/older times etc it's not totally uncommon. I'm not looking into this intently, just a bit of fun. Firstly a few quotes.
We believe that when the human life is over, the soul returns to tree's, to air, to fire, to water, to animals.
Some people questioned if the fire, water, earth sayings in The Welcoming meant anything.
Little rowan loved the March hares.
Obviously, the theme park opens in March but what a nice coincidence if it sticks to the schedule of opening at the season start.
Similar sort of eye features in the movie several times and is quite similar to the prop in the Welcoming.
Summer Isle vs SW8 maybe weathered to make it look similar to the buildings of that decade/island.
The skull in the Welcoming and some similarities in the movie, what part that section of the maze play's I'm unaware of.
Before the tarp went over the theming structure looks like of like the upper left part of this.
Rowan in the movie is said to be dead and buried, in the Welcoming promotion video a girl who looks vaguely similar & a grave are heavily featured.
There are similar Pagan rune symbols in the chemists? shop & the hog or whatever it is is similar.
You could work the story and pass off Alton Towers are Lord Summerisles residence.