Best scenario in this event is that another good third party buys Atlus so everything goes on how they went before the bankruptcy.
Otherwise, if it's completely Nintendo VS. Sony, Nintendo deserves them the most. I mean, Sony gets Persona, while Nintendo gets Shin Megami Tensei, Etrian Odyssey and Trauma Center. I'd mention Dept. Heaven, but both Nintendo and Sony get some of the games from the series. And I guess I could mention independent titles like Catherine, but there are too many to look up.