I just learned about the upcoming "DC Retroactive" line, featuring original period creators on the books:
http://scifimafia.com/2011/04/dc-retroactive-superman-the-70s-1-artist-details-revealed/Marty Pasko on the Superman 70s book, Marv Wolfman on the Superman 80s book (a
Crisis tie-in), and Simonson and Bogdanove on the Superman 90s book. Cary Bates writes the JLA 70s book. Looks like they are all one-shots, though.