Jail Break of Megatron?

Slashfilm, in reporting about 20 Transformers in TF II, slipped in a rumor from one of their readers involving shooting at the Eastern State Penitentiary near Philadelphia. Apparently the use of scale models of Megatron, Optimus Prime and Starscream where used in the scouting. Does this mean the return of Megatron or they just using his model just for scaling purposes? What will the old prison be used for?

“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.”

(source)