It would need to be as sleek and cool enough to fit in among other superheroes, but it should be a little different somehow.
But who could we trust with a task like that? And we happen to have a bunch just like it, if you want to start a collection of your own adventures!. The red sash belonging to a master archivist or martial artist would also be a nice touch. They'd have to be somebody who was really well-read, and well-traveled. Actually, this Women's Miss Marvelous Superhero Costume would work pretty well for a hero like that! You know, just in case there's some cataclysmic event that tears at the fabric of space and time, altering the past, present, and future.