3. Giant Asteroid
Call the Justice League, the Avengers, and any other universe’s superhero because we’re gonna need all of them if an asteroid is coming towards us. The good news according to an MIT professor, is that there is a one-in-a-million change of a giant asteroid hitting Earth each year. Luckily, we have real life super heroes with the technology to track an asteroid coming towards us decades or centuries before it comes so we can be prepared.