The reigning and defending UFC lightweight champion opened as a betting favorite over the Strikeforce lightweight champion for their April 20th bout at UFC on Fox 7. Ben Henderson isn't a huge favorite over Gilbert Melendez, but it's not that close either. Check it out (via BestFightOdds):
Only two sites are offering the line right now, but that will change soon. I'd actually consider betting on Henderson here, and might do it all the way up to -240 or so. While Melendez is an excellent fighter, I think he's giving up a lot of size and doesn't really have much of an advantage anywhere in the bout other than technical boxing.
That is not a line that I'd be touching at all. Cormier's rightfully the big favorite, but Mir's just tricky enough that it's not a complete blowout. Still though, Mir's price would have to go way up before I'd consider betting on him.