A movie is only as good as its weakest creative link — as clever or knowing or visually alive as the stodgiest, most old-fashioned, least-hip person in the inner creative circle. So if it turns out that there’s something a little bit wrong with Indiana Jones and the Kingdom of the Crystal Skull — something a wee bit underwhelming about the story, something rote or cornball or ill-considered — we all know who the big Blame Guy is probably going to be. This is so widely understood I don’t even feel the need to say his name. I presume it’s obvious I’m not talking about Steven Spielberg or screenwriter David Koepp.