New Transformers 2: Revenge of the Fallen set pictures showcase a new transforming robot: the shiny and ultra bad-ass Jetfire. John Turturro (Sector 7 Agent Simmons), Megan Fox, and Shia Lebeouf were all filming at the Smithsonian Air and Space Museum in Washington DC. Click through to see a gallery from the film set and a list of the new Transformers appearing in T2.
Transformer Jetfire (A Decepticon turn-coat) transforms into a SR-71 Blackbird (awesome). According to a leaked crew call sheet from other new Transformers appearing in T2 are Stinger, Arcee the girl motorcycle, The Twins (which turn into an ice cream truck), an unknown Decepticon that transforms into a Audi R8, a wheely robot, and a construction earth mover.
(TheBadAndTheUgly has pictures of three identical-looking women in motorcycle leathers, who may be the holographic "riders" of Arcee in her motorcycle form. Some sources suggest Arcee actually splits into three motorcycles instead of transforming into just one bike.)
Sources confirmed to io9 that the title, Transformers 2: Revenge of the Fallen is more than meets the eye. The "Fallen" refers directly to ancient Transformer from the comic books. Worshipped/feared as a type of devil by other Transformers, the historic robot has been around since the beginning of the universe. The story actually begins with a god-like character named Primus, who created life, and the 13 original Transformers, to battle his foe, Unicron the massive planet-eater. One of the original 13, the Fallen became the Judas of the group when he betrayed his fellow 'bots and dedicated his life to Unicron. When Unicron was sucked into a black hole into another universe, the Fallen was trapped in the "underspace" between dimensions.