Wednesday is a good day for Wonder Woman. This 69-year-old superheroine, published by DC Comics, will don a new — and less revealing — costume and enjoy the publication of Issue No. 600 of her monthly series. The costume ties into an alternative history for the character devised by J. Michael Straczynski , the new writer of the series. Mr. Straczynski, who created the television show “Babylon 5” and wrote the screenplay for “Changeling” in 2008, starring Angelina Jolie, said in an e-mail message that he wanted to address “the wardrobe issue” as soon as he took the job. “She’s...