Great question, even for us less-cool-kids-who-aren't-part-of-the-UnicornSquad / (Boston Marathon).
I've already started pondering this question: What themes would sucker, I mean significantly engage me, to drop another several hundred on registration, food, merch and transportation?
1. Anything Star Wars.... I mean now that I did the StarCruiser, I think we can all agree that there are few limitations to my nerd-financial-folly.
2. Most themes related to MCU (Marvel)... or anything related to Black Panther / Wakanda.
3. Anything that promotes characters of color within central thematic components.
4. An innovative use of a ride, park equipment/layout or resort area that would be incredibly unique to this event.
5. Puzzles? Scavenger hunt? That sounds fun... but that one course needs another "something cool" for me to assume the travel and registration costs.