With “Kalki 2898 AD,” Telugu cinema filmmaker Nag Ashwin rifles through a century of sci-fi and fantasy extravaganzas to create a wildly uneven mashup of everything from Fritz Lang’s “Metropolis” to Marvel Comics movies, underpinned by elements from the Hindu epic poem “Mahabharata.” It’s billed, perhaps optimistically, as the first chapter of the Kalki Cinematic […]