“I’ve heard of Bram Stoker’s Dracula, but Mary Shelley’s Frankenstein?!” That seemed to be the general reaction to the release of an unofficial companion piece to the 1992 Francis Ford Coppola adaptation of the famous vampire novel. Two years after that film, Coppola produced a lavish big-budget version of Frankenstein for director Kenneth Branagh, purporting to stick closer to the source material than the 1931 Universal horror classic.