batwoman and wonderwoman fight off some vamps

AU wonder woman and bat woman are the only superheroes left on earth, ever since a new galaxy was discovered that had hundreds of planets for all sorts of species, alien villains lost interest in earth. Who could truly blame them?
Since earth had little need for heroes like Batman and Superman, they took off, creating their own planets and keeping other galaxies safe.

So what would happen if the species from another planet find out about earth, or rather, the species that roam the earth, the humans. What happens if the blood thirsty creatures, so called vampires, escape from their planet and invade the earth?

Are Wonder woman and Bat woman strong enough to protect the people they vowed to keep safe?
And between all the fighting and life saving, is there time for one very quick make out session before the world ends?