I was expecting an answer about why Christianity doesn't touch on those levels of the 'cultural conscious' that you identified ('social-ego, cultural-shadow, historical unconscious, and collective unconscious'), but I don't think you've provided an answer to that.Because European Christians fight wars from the 11th century to the modern period where they don't have a problem with selling all of their possessions and living like Jesus and the Early Apostles. Coveting material wealth and being materialistic is something normal to Indo-European cultures and European Christians are pretty materialistic where wealth is something repudiated in the in the Bible. Even European Protestant Christians in particular Calvinist ascribe a solid work ethic and material wealth as sign of God's election. European Christians invent Alchemy and Natural Science and there are several campaigns by Christians like witch trials, the inquisition, and reformation to act as backlashes and repressions of Pagan beliefs and tradition reemerging. Harry Potter, Star Wars, Marvel Movies, Lord of The Rings, Chucky, The Shining, Disney Movies, all feature heroes, creatures, themes, elements, principals that come from Pagan and Indo-European religion and mythology. Most of our most favorite and popular Holidays are Pagan in Origin that have been Christianized. More European people are becoming non-religious, because there is a pagan underneath that needs it's due, what is unconscious seeks to become conscious.
.
I'm not sure where 'materialism' connects to this question, but you do cite a lot of phenomena as examples of 'paganism' re-emerging that are very strictly Christian in actuality. For example, inquisitions were established to repress Christian sects that threatened to overturn the Catholic church's monopoly on apostolic authority, rather than being anything to do at all with 'paganism'. Cathars, Waldensians, Albigenses, the 'good men' of Jacques Fournier's deposition records, and so on.
The examples you cite of pagan themes re-emerging in modern media are also interesting in that practically all of them are inseparable from Christian narratives of messianism (the 'chosen one') and contests between sharply defined forces of good and evil. Pre-Christian European pagan religions tended to have neither of these features; the gods were famously capricious and could do evil as well as good, while the heroes of those stories were rarely if ever messianic. I don't see what's so 'pagan' about those stories you've cited.
I'm not sure you're making a very good case here, as much as you are layering examples upon examples that are so numerous as to be difficult to deal with - a 'Gish gallop'. Do you have one example or phenomenon that you consider to be a particularly strong argument in favour of your position?