They are a rumor, recognized only as deja vu and dismissed just as quickly. They are the Men In Black, an organization specializing in protecting the identities of and defending the earth from extraterrestrials. This June, the MIB will return in Men In Black: International, the fourth entry of the franchise once headlined by Will Smith and Tommy Lee Jones, starring Chris Hemsworth and Tessa Thompson. Thor and Valkyrie fighting aliens - yeah, that checks out.