“Thor: The Dark World” opened to $31.6 mil in the US Friday night and is headed to a possible $90 mil weekend. Disney/Marvel should be very pleased. The worldwide take all in is now $141 mil. And that’s just in a couple of days. By Sunday, Thor’s hammer will have reaped a lot of rewards. It’s a good thing that Loki {er, wait, sounds of writer being dragged off…)