The Marvel Cinematic Universe is a big deal these days. Love it or hate it, the MCU has taken off in an unprecedented manner. Just last week the box office vacuum known as The Avengers was pushed back into public consciousness by the very entertaining Iron Man 3 and while watching that excellent film I was once again reminded that Marvel has one hell of a casting department. No matter how you felt about the re-invention of The Mandarin, surely you wont argue that Ben Kingsley was an excellent choice for that material. How about Guy Pearce? Ive heard some criticisms of him but I thought he was a perfect fit to the Iron Man canon and did an excellent job. Over the past few years weve seen some casting choices so perfect that the general audience might find it impossible to accept anybody else in those roles. Robert Downey Jr. as Tony Stark was ingenious. Tom Hiddleston has become a fan favourite as Loki. Villains have been played by actors previously showered with accolades such as Hugo Weaving and Mickey Rourke. Even the love interests (who have so far been given mostly limited material) have been realised by excellent actresses such as Gwenyth Paltrow and Natalie Portman. Every time a new Marvel film is announced, fans go crazy speculating on which excellent actors and actresses we might get to see join this extended universe. The thing that makes it seem so exciting, to me, is the thought that every one of these brilliant choices is joining one big narrative. Knowing that all of these characters exist in the same world allows us to picture them all as being part of one giant film. They are all connected, they all exist. It gives the roles a special prestige and adds depth to the overall universe. Very few important characters have been neglected in terms of casting so far. So Ive decided to compile a list of the top ten that I would like to see join the MCU. I have chosen them based on the kinds of roles available, their existing filmography and their relationships to the directors involved in the franchise so far. Ive also excluded anybody who had a role in a superhero film so far...just to be fair. Let's get to it...