A new promo image for Brian Michael Bendis and Ryan Sook's Legion of Super-Heroes reveals the return of some long missing DC characters.A promo image for the series prompted Bendis to retweet a look at Sook's previously revealed character designs. However, there were several characters in the image not included in those enhanced images. Among those appearing on the poster are Saturn Girl, Mon-El, Lightning Lad, Shadow Lass, Cosmic Boy, Chameleon Boy, Brainiac 5 and more. Some of the characters have undergone some pretty drastic alterations in the time since they last appeared in print.RELATED: Doomsday Clock's Story Is Connected to Bendis' Legion of Super-Heroes

Prior to the start of his ongoing Legion of Super-Heroes series, Bendis will helm Legion of Super-Heroes: Millennium, a two- part series featuring stories with such characters as as Supergirl, Batman Beyond, Kamandi, Tommy Tomorrow, Booster Gold, OMAC and, of course, the Legion of Super-Heroes. The story itself follows a main character, with whom Bendis says fans will be familiar, after she finds herself endowed with immortality.  The series will feature work by multiple artists, including Nicola Scott, Jim Cheung, Dustin Nguyen and Jim Lee.

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Bendis' Legion of Super-Heroes: Millennium #1 is scheduled to be released on Sept. 18, followed by issue #2 in October.