BOSTON (AP) — Get out your favorite Sailor Moon costume and grab a bottle of water. The Boston Comic Con is this weekend, and it's forecast to be a hot one. From Friday through Sunday, comic and costume fans will gather at the Seaport World Trade Center for a line-up of contests, panels and celebrity appearances. Here are some things to know about the Boston Comic Con: ___ CELEBRITIES People-watching won't be limited to the costume-clad fans; several celebrities are being featured at the convention, too.