Anakin is not going to look like Hayden for the simple reason that Vader died as an old(er) man, not as a young Hayden. Look at Yoda and Ben; they are not their younger selves, but as they were when they died
Yes, but apparently when Anakin turned to the dark side, he became Darth Vader and Anakin died. Obi-Wan and Yoda even said that.