I sympathize with your challenge. Exorcism is a well-worked vein of ore — but one that keeps attracting movie makers in hopes of discovering another box-office Bonanza.

There are some takes that I am not aware have been done yet. Such as: Rather than recycle the tired trope of a priest who has lost his faith, why not a priest who is gay and the prime suspect in a molestation scandal? Or what if the best man for the job exorcism is…a woman, a nun, but if she practices her gift, she will be excommunicated? What if the Catholic ritual fails, but an aboriginal ritual works?

Anyway, best wishes with your writing.

What is there about the story you have in mind that’s fresh, that differentiates the story from all the other movies that have already been done on exorcism?

I’m only asking the question that everyone who can make a picture happen is going to ask when they read your logline.

My point, my only point, is that If you’ve got a premise that’s fresh, the current iterations of the logline don’t reveal it.