Ninja Turtles 2 producer Michael Bay has pulled back the curtain on the flashy new vehicles set to appear in the upcoming sequel to Paramount's reptilian blockbuster. In addition to a pair of photos showcasing the Turtles' new van, Bay's tease on Twitter also includes an image of a Polaris Slingshot, accompanied by the description: "Just some stuff I found…" Here's a look at Polaris' three-wheeled motorcycle. Continue reading…