The Wicker Man was famously called "the Citizen Kane of horror films." It's long-gestating seauel, The Wicker Tree, could be called the Citizen Ruth of horror films.
Though the remake has its defenders, perhaps it was dismay at that remake's liberties and distortions that drove Hardy to return to the subject matter. To do so, he adapted his own novel, Cowboys for Christ (2006), a partial sequel, or at least a consideration of the same themes, to the screen in 2010 as The Wicker Tree.
Under the misdirecting influence of Morrison, the people of Tressock are sun worshipers, putting their hope in Sulis to save their future. In this way, The Wicker Tree mimics Citizen Ruth by pitting two brands of extreme moral conduct, the chastity embracing young saving themselves for marriage (like the kids in the horror satire Teeth), and the desperate characters whose view of sexuality is less sybaritic than medicinal. Wicker Tree also juggles other aspects of contemporary British life, such as the wildly polarized views on both nuclear power and fox hunting.
Worse, though, is that some of the situations don't make sense. If the villagers want Beth to be the May Queen, why do they attempt to poison her and turn her into a desiccated statue? If the villagers want Steve to make it to a certain castle so that they can surround him and eat him, why do they cut his saddle so that he will fall off the horse before he gets there? These are just two of numerous plot elements that are either unanswered or don't make sense.
That being said, The Wicker Tree is often entertaining as it grapples with polarizing ideas and extreme beliefs and behaviors, and with the bleakness and nihilism that is typical of horror films lately.
1 In retrospect the scene is poignant, since Lolly is inviting the fertilizing powers of the sun within the very substance that is sterilizing her.
2 There is a scene in which Morrison's man Friday, Beame, is nearly castrated by Beth, and is repaired by a scullery maid in the kitchen. It's the kind of broad accent-driven humor formerly found in the British Carry On series.