Talk about a throwback: raiders of a lost artifact are romancing an ancient stone capable of granting its owner worldwide domination, but despite a few footloose flashdances of frivolous fun and a flurry of war games capable of shifting the def con, this comic strip bonanzarama devolves quickly into an aggressively tone-shifting eclectic boogaloo. Patty Jenkins follows up her original solemn Wonder Woman with an off-the-rails sequel, WW84 (C), set in the excess of the eighties, and it’s largely a lasso of lunacy. The DC Universe settles in D.C. as the protagonist quietly works in the museum antiquity business while side hustling with crime fighting on The Mall and at the mall. Despite her gorgeousness and swell stunts, Gal Gadot looks like she has a migraine for most of the movie as her plucky naiveté transforms into full warrior mode. She’s still the best thing about the film and adds pomp, pageantry, grace and grandeur to even the most throwaway lines. Kristen Wiig fares poorly as an underwritten friend turned rival (it’s like her SNL “Penelope” character says, “I can be a CGI character too, and mine is a fierce cat!”). Pedro Pascal is also adrift as a villainous megalomaniac whose intentions vary scene by scene. It’s like you get two villains for the effect of one. Only Chris Pine in an extended cameo retains a bit of dignity. Nearly everything earthbound in the story including a prolonged wish fulfillment conceit is a relative dud; but when characters take flight, including in the famous invisible jet, the film mildly soars. Action sequences, more infrequent than expected, largely deliver on the storyboard. But most of this anticipated blockbuster is a clunky cacophony, and even nifty nostalgia can’t save it.