It’s Hollywood arithmetic at its finest, really: first, take one movie star with enough sex appeal and charisma to power the Eastern Seaboard, give him a lead role, and rake in the dough. Now, take two movie stars with sex appeal and charisma: 1 + 1 = 2. Two times the success and the dough. Or it may even be exponential, so you get the amount of dough squared.
And if this has worked once, what are you going to do? How about making another film with that duo of stars that has worked so well previously? You could even get back the director who helped make the first film a hit. What worked once is certain to work a second time.
A Damn Fine Cup of Culture 