I guess after 69 years of sporting the same outfit, you might want a makeover, but oh, Wonder Woman, why jeggings? To be fair, the 600th issue of the series is also giving Wonder Woman a revised back story. Writer J. Michael Straczynski notes that:

Wonder Woman, instead of growing up on Paradise Island with her mother, Queen Hippolyta, and her Amazon sisters, is smuggled out as a baby when unknown forces destroy her home and slaughter its inhabitants.

To go along with that her new outfit is supposed to be darker and “less costumey.” Which is cool – we just hope she still has a golden lasso.