It's looking more and more like that none of the original cast from the Transformers series will return for the recently announced fourth film.
Josh Duhamel told E! Online "I don’t think anybody’s doing it. I know Shia [LaBoeuf]‘s not doing it. I don’t think Tyrese or Rosie [Huntington-Whiteley] or anybody else is doing it." No word on who exactly will be doing it, but franchise lead LaBoeuf was only ever signed on for three films and seemed to keen to move away from the series as soon as it finished. Michael Bay is coming back and the new film will be released sometime in 2014.
Reported before about Bay coming back and still don’t really get it. Most other directors have to be dragged kicking a screaming to do a sequel and he's prepping his third one.