Answer the following question: Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: Who are the antagonists? Title: Batman Movie plot: This campy Batman movie based on the 60's hit series, is full of all your favorite main villains. The villains team up on a plot to destroy all the worlds leaders from a peace summit. Batman and Robin are entangled and nearly destroyed. Bruce Wayne's alter ego falls in love with a lady, who is purrrfectly sweet. But if looks could kill.....The mayhem begins when the Dynamic Duo sail into the ocean on the Batboat to the yacht of Commodore Schmidlap, a yacht that proves to be a holographic hoax that leaves Batman caught by a shark filled with explosive that must be defeated with a handy can of Shark Repellent Batspray.The four villains - The Penguin, The Riddler, The Joker, and Catwoman - use the ocean buoy that projected the hoax to lure Batman and Robin into a magnetic torpedo trap, but a powerful reverse polarizer by Batman saves the day for the moment, only to see the batteries run dry - until a school of noble dolphins rescues The Dynamic Duo from The Penguin's underwater missiles.The Fearsome Foursome set another trap by kidnapping billionaire Bruce Wayne, a trap that goes awry and leads to a hectic dash by Batman to dispose of a bomb with innocent people all around and Batman left to mutter about how getting rid of a bomb can't be done on certain days, which leads to yet another supercriminal trap involving The Penguin himself infiltrating the Batcave with dehydrated thugs - whose rehydration goes wrong and leaves Batman to trick the Penguin into leading them back to his criminal cohorts' scheme at the United World building, where the supercriminal scheme takes place and a final confrontation on The Penguin's war-surplus submarine ensues.Find out the outcome of this confrontation in this exciting feature length film. Same Bat-time same Bat-channel.
Answer:
Several villains who team up together.