| Setting the Stage |
...Dread Pirate Roberts? Really? I must have missed that scene where he disguised himself as Wesley to win over the soldiers.
Wesley isn't Roberts's alter ego. Wesley is Roberts*. He's an ordinary, "mild-mannered" farmboy only at the start of the movie. Then he becomes a pirate. They aren't alter egos—if anything, they're just character evolution.
That said, I do think the comparisons to Batman are making people focus way too much on the "superhero" side of things. But that's probably just because of the very concept of the secret identity.
*I know, I know, but you know what I mean.
The old one retired and wesley took his place. It is a persona each dread pirate roberts takes and leaves behind for the next so it is an alter ego that they spend their lives in and discard when they retire. So he is an example of wearing a costume always. Eventually inigo will take on the costume and become the dread pirate and wesley and the princess will go on to live happily ever after.