i've got to thinking about this after what James Cameron did for Neytiri played by Zoe Saldana in Avatar and Gollum in Lord of the Ring. in this case, i hope any future live-action Transformers movies use this technique of using the actor or actress's likeness, using their voices, and making them do the stunts to create the character. but for characters like Optimus and to some extent Megatron, they should still be voiced by the talents that made their character (Cullen, Welker). i really like how ILM did Prime's face in the live-action movies. it is mechanical and robotic, yet organic and expressive. on the same token, i love how the Cybertronians can articulate their eyes and blink. it's a really good way of creating expressive characters out of robots. when i thought of robots, i used to think the Terminators, lifeless and emotionless, that is until 2007 when the alien robots from Cybertron that could think and feel made their live-action debut and changed my concept of what robots could be lol. although the character designs for Transformers 2007 were excellent, i think they missed the mark with ROTF. i thought they missed a really great opportunity to create more iconic and strong TF characters. for instance, the fembots were so underused and they couldve been among what madre ROTF a lot better. i thought that was a golden opportunity to create and introduce a Lara Croft-esque fembot. the fembot designs were really underwhelming, that it just highlighted some of the things that were wrong in the live-action movies for me that i'd i guess ignored before since TF 2007 i thought was really good (to some extent the story, Starscream's face, some of the other design choices which couldve been far better, etc...). then, June 22, 2010, War for Cybertron came along and i mostly liked the design choices there, except i thought live-action Optimus design is still the best Optimus incarnation imho. also, this would go along with the live-action Optimus because in WFC, their faces are liquid metallic. it's good on video games and cartoons, but this also was the appeal of the live-action movies for me because their designs are more realistic. if they have a part on their body that was made of that, why couldnt other parts be made of the same mold too? thats why, i think future live-action movies could employ the great G1 based designs of the characters we've grown to love over the years just like what the WFC makers did, but maintaining the realism of the live-action movies (no liquid metallic faces - im sure theres a way of taking an actor or actress's face and simply make it the robotic/mechanical versions of themselves in a fashion similar to Prime's face in Bay's movies. they did it with Zoe Saldana for Neytiri and Andy Serkis for Gollum, they can do it in Transformers and see how our favorite actors and actresses look in their robotic version. besides, this would be a big chance to create real multi-dimensional characters. im all for seeing Arcee played by Megan Fox, The Rock as Cliffjumper, Chloe Moretz as Chromia [Hit Girl as Chromia FTW], Steven Seagal as Megatron, R. Lee Emmey as Ironhide, Scwarzenegger as Grimlock, Chuck Norris as Zeta Prime, etc... lol; no mass shifting of the characters; etc...). i hope with future live-action movies (with the exception of Optimus and Megatron's voices maybe) take this route and use the actor/actress's likeness and stunts (and their voices) in crafting the CGI TF characters. everyone else, unless a TF doesnt have a humanoid face, could be played by actors and actresses using their likeness, voice, stunts, etc. and translate it to CGI magic. anyway, just my 2 cents.