Khan should win it but Molina is using the same strength and conditioning coach as Valero used so you never know, he might increase his power significantly and shock Khan. He definitely throws some short left hooks, just like Garcia.
This fight will basically decide Khan's future, if he wins he could still eventually be in contention for a Mayweather clash down the line, that's if he can first beat the Brook or Alexander winner. We could potentially see Mayweather vs Khan next year.
If Khan loses, he may or may not continue with his career. He's getting married and he's already got more money in the bank than most people see in a lifetime. I'm pretty sure if he lost this fight his family would put a lot of pressure on him to quit boxing.