5. Ghostbusters
Who you gonna call? Well, we already know that an all-female, or at least heavy female, version of Ghostbusters is in the works. With Harold Ramis having passed on, it might be best to leave the franchise be, but Hollywood never met a dollar it didn't crave, so there's no doubt going to be some sort of sequel/reboot at some point. And if the ghosts in the new film need punching, or to be arm-barred back to the grave? Well, why not Rousey? You've got to believe that she's not easily scared, and would be willing to go head-to-head with all sorts of ghoulies and ghosties. She's fit, so she should have no problem lugging that proton pack, and no EPA pencil neck would dare push her around!