BD of a woman giving birth:
Pro: nobody's done it yet
Con: have to hook up a prenatal Wreath, which is more expensive
BD of the most common dreams – compilation:
Pro: it's doable
Con: I'll have to consistently scroll the dreams of a dozen/couple dozen people over at least 1y to catch the repeating themes – flying, swimming, falling, going to work/school naked
2 BDs scrolled by two actors, neural tracks set up so that it looks like one BD:
Pro: it'd be nova
Con: tech for it doesn't exist