I personally would want Jean-Paul to come face to face with how nationalism, xenophobia, racism, and right wing politics have polluted and poisoned Evangelical Christianity - largely because I’m a Christian who finds the “Evangelical” movement to have become something horrific and ungodly, and I NEED to see it get deconstructed from the spiritual side. I want to see Jean-Paul deal with people who blatantly ignore pretty much everything merciful and compassionate in favor of trying to play-act as Old Testament Israelites, who can’t separate their faith from their skin-tone and desire for capitalism, and would be the type to follow a blatant charlatan.
I could see Scratch back as a “Hollywood Satanism” type of character, but honestly, I’d find it even more hilarious if he were to portray himself as a “born-again” “reformed” guy, complete with spray tan and holding a Bible upside down, even if it was just for a single arc. While I’m a (religiously evangelical, but not political) Christian myself, I also don't see much use in replicating Hollywood’s misinterpretation of Satanism anymore than in replicating Temple of Doom’s idea of Hinduism.
About the only type of religious approach I don’t care for would be the Dan Brown-type of “religious horror” that Jeff Lemire used with Michael Lane’s Azrael run - more because my education as a Social Studies teacher rebels against poorly researched mythologizing of real world mainstream religions than out of my religion itself. None of this “the eighth deadly sin is faith!” nonsense when Spectre can be far more terrifying without such nonsense, and when the Holy Grail and other stuff can show how to use myth stuff better.
It was, in summary, basically just a summary of his old origin in a highly abbreviated manner - Mother sold a New 52 version of the Order of St. Dumas a pre-brainwashed and trained Jean Paul, who then got freed from the order in time for the TEC book.