After finally knowing that the Ferrari is Mirage and hours of staring at pictures of him (rubbing eyes), I could to think that they were originally going to call him Rodimus or Cliffjumper. For Rodimus, I started comparing pictures of him and Mirage. He was almost the same with being a Red sports car, weapon on arms (well, Rodimus has gun and Mirage has swords), front part of car is chest and his crown almost matches Mirage's. For Cliffjumper, He was almost the same Transformation as Bumblebee, just like in the cartoon. Doors are wings, almost the same face, same chest and he hangs around Bumblebee a lot. I think because the renamed him Mirage was for these reasons. Originally Rodimus, but was removed because of Merchandicing. then Cliffjumper was removed because Transformers Prime called right for him (just like the cartoon The Batman, they were originally going to do Scarecrow for one episode but the movie called rights for him so was replaced with Hugo Strange). Trust me, I heard awhile ago they were originally going to call Sideswipe Hot Rod, but dued to Merchandicing he was renamed.