Slash Film have reported, via Jason X, that TF2 producers were scouting locations with scale models of Optimus Prime, Megatron and Star Scream:
My girlfriend works at Eastern State Penitentiary in the Fairmount area of Philadelphia. It was used as a prison from 1829 until 1971, and is now a historical site and museum. Anyway, at the prison today producers for Transformers 2 were on site with scale models of Megatron, Optimus Prime and Star Scream and were scouting filming locations in cell block 1 and the prison kitchen. Just thought I’d let people know that filming should begin here soon.