The young roving performance collective Witness Relocation is being typically cagey about its latest raucous dance-theater whatsit. Here’s what we know: It will consist of over 30 short vignettes presented in a random order every night; if there’s an over-arching narrative or theme, it’s invasion; and the photos we’ve seen so far show a man in a frog costume and a woman dressed as a princess engaged in some kind of duel. Be there.