The sweeping line-wide retooling of DC Comics' superhero titles that will see the debut of 52 first issues introducing "a more modern, diverse DC Universe" has been referred to in a number of ways -- a renumbering, a relaunch, a revamp. But what it isn't, apparently, is a "reboot."

"This is the launch of the New DCU," DC's Senior Vice President-Sales Bob Wayne explains in a letter to retailers. "It is not a 'reboot.'  I think you will soon discover why that is." Note also that it's "New DCU" and not, thankfully, "DCNu" (so cut that out).

What differentiates Tuesday's announcement, with its across-the-board No. 1 issues, promises of new origins and new (younger) ages for some characters and minor changes for others, from a reboot, of course, remains to be seen.

DC revealed the first wave of titles yesterday -- 10, plus the earlier announced Justice League by Geoff Johns and Jim Lee -- including Wonder Woman by Brian Azzarello and Cliff Chiang, The Fury of Firestorm by Ethan Van Sciver, Gail Simone and Yildiray Cinar, and Aquaman by Geoff Johns and Ivan Reis, followed this morning by the four Green Lantern books. That leaves 37 more series and creative teams to be parceled out between now and Tuesday, June 13, when the publisher's September solicitations will be officially released.