Serkis is King Kong!

"[I] won't be [acting against] nothing," Watts said. "That's one of the things he told me in our initial meeting, because I would be very worried about that. Andy Serkis is going to be not only a character in the film, but he's going to be a pair of eyes for me to look at [on set]. There's a huge amount of emotion looking [at him]."

So Andy Serkis will be King Kong on set. If I was an actor I don't think Andy Serkis would be quite as scary as 50 ft tall ape rampaging towards me, but then again thats just me. This is just one of the reasons that CGI really bothers me.