There are all sorts of crossovers in TV land. The DC heroes on The CW have their own Justice League with four-way crossover events, Netflix’s heroes of Hell’s Kitchen are coming together in The Defenders, the world of New Girl collided with Brooklyn Nine-Nine, and there’s even gonna be an animated crossover between Supernatural and Scooby-Doo. But, while a Supernatural–Arrow mashup isn’t the craziest concept we’ve heard, actors Jensen Ackles and Jared Padalecki are pretty realistic about its chances of happening.