Siver-Cerrone is definitely more of a main card fight than Hioki-Roop since both those guys are on winning streaks. But you gotta realize UFC is doing this to try to showcase Hioki. The guy is highly ranked by most MMA sites but is a relative unknown to the casual fans in the US. A dominating win could very well lead him to a possible title shot. The timetable for this fight also seems to be just right for Hioki to be able to fight in the event taking place in Japan. Would be great for UFC to have a title fight with a Japanese fighter in Japan.