I rather prefer a new Abrahamic religion based on the Archangel Michael.  Abrahamic religion was originally polytheistic like Greek religion, with different gods for each tribe or city - although each one believed in the others, they just only worshipped their own.  Eventually one group became politically dominant so they made their god the most important and relegated the rest to angels (look up henotheism.)  Well forget that, we're bringing Michael back as the main man, he had a flaming sword so he's more metal and therefore better.

Failing that, we can start a neotenous religion around Santa, for adults who make it through childhood without being disillusioned.  This larval developmental stage of Christians will become the whole religion, much like the theological answer to jellyfish that are actually  polyps that stay in their juvenile stage and never attach to a rock.  The Clausists will regard the original Trinity like the Greeks and Romans thought of the Titans or the Norse of the Jotun (frost giants, same Indo-European root myth though.) I'm not even high.