Rosie Probably Not Returning

Rosie Huntington Whiteley has posted some casting news on her Twitter page. She doesn't think she will return.

I loved to be part of the "Transformers 3" film, but I don't think I will return for Transformers 4....

If no human characters (or 1 or 2) return, I'm thinking that TF4 will be kind of like Pirates of the Caribbean: On Stranger Tides. Characters left, but there was still continuity. We still won't know for sure about any casting details though probably until late this year.