All I have to do is laugh...at how gullable you guys are. If you seriously think that those two actors are playing the characters in Episode 3, you are definately not Star Wars fans.
Hayden Christiansen plays anakin, and still is. James Earl Jones(the voice of vader in the Original Trilogy) will be returning for the voice once again. The person who will don the armor of Vader will be most likely either Hayden or David Prowse (the original person who wore the armor).
Nice joke, but it utterly failed. As even the title hasnt released yet, and will if anything be more around the lines of Revenge of the Sith
I sincerely hope you were joking though, for your own sake.
Here is anakin, how he looks in Episode 3 if you are wondering.