but I think what these guys did probably made Universal a little antsy in the same way a Trump/Biden costume or a Pope outfit might. Harley Quinn might cause some confusion between Scareactors and Guests, but the latter could potentially cause some controversy and bad PR that reaches far beyond the HHN guest experience or whatever. Universal doesn't like framing things as "The Devil", or "Angels Vs Demons", for similar reasons. See The Darkest Deal's "Collector", and "The Fallen"s' theme pivot.
I also think it's worth noting that costumes have only really been an issue since HHN30 and COVID-19.