The main base of it is going to be fairly plain, my thought being that after this event, I can use the building for other events in the future, as well as rent it out to people for their events if they want to use the space, sort of like an Invaded convention center. For this even specifically I'm planning to decorate it with holiday colors and make various minigames like a dunk tank, some archery game, booths for selling things like mapart, enchanted books, and other neat things, and also set up a stage or 2 for controlling music and some of the redstone I'll put in.