If nothing else, Paramount’s attempt at a big-screen “Teenage Mutant Ninja Turtles” reboot should make for a fascinating case study in the power of fan outrage. Following the online uproar over their proposed deviations from the original material, among them a shortened title (“Ninja Turtles”) and a bizarre alien-planet backstory, producer Michael Bay and director Jonathan Liebesman have delivered a back-to-basics origin saga that is neither a particularly good movie nor the pop-cultural travesty that some were dreading. Much slicker-looking but less endearing than its ’90s live-action predecessors, the film manifests all the usual attributes of a Bay production — chaotic action, crass side jokes, visual-effects overkill, Megan Fox — but is nowhere near ...