He said he would be back! The new trailer for Terminator: Genisys dropped Thursday, Dec. 4, providing a first glimpse at Arnold Schwarzenegger's wildly anticipated return to Hollywood as the liquid-metal robot."Terminators don't wait for timelines," Schwarzenegger, 67, wrote on Facebook alongside the preview. "They create them. Here's the Terminator Genisys trailer. I'm back."PHOTOS: The best and worst movie remakesThe...