"When we do the Darksiders sequel, it'll be a different character and take place simultaneously to the other story," Bilson said. "There's only one apocalypse -- I couldn't very well have four different apocalypses, one for each rider. It has some new mechanics and some very robust features that differentiate it a lot and grow it from the first game because you have to build on the first one, you can't repeat it. I think that's very important in franchise-building."