You sure about slim to none? If we're making the big assumption that Israel gets through his next 2-3 title defenses before Edmen shows up, based on what we've seen from the youngster, there's no reason to think that he couldn't win that fight.
Edmen's four UFC fights have ended by him winning via split decsion, first round knockout twice, and first round submission once. Israel's first four ufc fights ended by him winning via split decision, unanimous decision, first round knockout, and second round knockout. They also both fought Tavares, and Edmen put him away quickly, while Brad took Israel the distance. Not saying that Edmen's a shoo in to beat the guy, but saying his chances are slim to none in a year or two is asinine.