On-sale date from copyright registration.
Showcase Presents: Supergirl (DC, 2007 series) #1 credits the inks to George Klein.
The name of character Ricky Avalon is a combination of Ricky Nelson and Frankie Avalon.
Letters from Nicole Florent, Carol Barton, Gerald Pfingsten, Stewart Silinsky, Mike Calegari, Claire Oskins, Myra Smith, Monty Connor, Mark Lehmann.
Average copies sold previous year - 492,000.