In "Arrow's" last episode, fans cringed when they saw their beloved superhero fall off a cliff. Did Oliver Queen finally meet his demise? Is Oli really gone? That's highly doubtful, given that he is the central character of the show. So, what's going to happen then? The sneak peek already gave a tease as to how Oliver will return to Starling City. But of course, the promo didn't give all the details away. Everyone will have to wait for "Arrow" to return for its mid-season premiere in January to find out what really happens. Thus, for now, speculations should do. One of the things that make "Arrow" season 3 episode 10 special is that it is co-written by Marc Guggenheim, one of the showrunners. Via Twitter , he teased followers back in October with a photo that showing his name written as a co-writer on the script for "Left Behind." And fans of the show would know that when Guggenheim writes an episode, it's going...