Here I have three pretty renditions of the prequel posters done on one of my favorite canvases, Sketch Cards! 

Now, I know the artists for the first two cards and in order it’s; James Bukauskas and Joe Hogan, but unfortunately I’m not sure about the ROTS one. Now, If I had to guess I think it’s also James Bukauskas’s, because he has a signature like that scribble too, but other times signs as “Bukshot-!” But I could be totally wrong.