At a budget of rougly $2 each, the Paranormal Activity franchise has grossed something around $2,000,000,000,000 worldwide. It's a bonofide phenomenom. So it's makes sense that Paramount would want to keep them coming. But the "found footage" nature of the franchise makes sequels more and more difficult to justify, while the closed-door ending of the first film makes forward movement plotwise almost impossible. As a result, we keep getting prequels from the franchise, with Paranormal Activity 3 going all the way back to the 1980s to see the main characters as little girls. With the prequel option pretty much exhausted, it's going to take some high-end creative thinking to keep the Paranormal Activity train rolling. Luckily, we at UGO have some ideas about how to give the franchise a worthy fourth entry. Here are our Paranormal Activity 4 concepts.