A friend who’s seen Martin Campbell’s The Legend of Zorro (Columbia, 10.28) says it runs something like two hours and fifteen minutes, give or take. If this sequel to Campbell’s The Mask of Zorro (1998) is anything like its sire, Legend is going to be throwaway crap. (The trailer gives you ample indication of same.) If you’re making a piece of glossy junk, it goes without saying you don’t let it run too long. 95 to 100 minutes…105 or 110 minutes, tops. You certainly don’t let it go as long as two hours, and anything longer than that would be burdensome beyond reason.