Miguel Vargas, mystery White Sox see movie in Spider-Man costume

CHICAGO — One of the key traits for a superhero is to keep his everyday persona separate and often secret from the alternate personality possessing the special world-changing powers.

But Monday’s case of “who are the White Sox Spider-Men?” has gone to a higher level of secrecy.

Third baseman Miguel Vargas posted a picture to his Instagram of two people in Spider-Man outfits reportedly…