This issue is a variant of Superman (DC, 2006 series) #700. There exist further variants.
This issue went on sale 2010-06-23 (on time). "Printed by World Color Press, Inc, Montreal, QC, Canada. 06/16/10."
Three covers were done for this issue; one featuring primarily Superman and Lois, and two alternate ones featuring just Superman (25 issues for 1 issue mixture in color, and 75 issues for 1 issue mixture in black and white).
For every 75 copies of the standard edition, retailers were allowed to order one copy of this variant edition. This is a black and white version of the 1:25 cover, with the only color being some red in the logo and issue number.
This story is set in the past. The scene on the first page with the boat sitting on the street in front of a Metropolis police station is very reminiscent of a similar scene in Superman: The Movie.
Story continues in the next issue.
The art includes previews of the covers of Action Comics (DC, 1938 series) #890 and #892, page 11 of Action Comics #890; the covers from Supergirl (DC, 2005 series) #55 and #56; pencils from an interior page of Supergirl #54; and page 2 and the first panel of page 4 of the Superboy story in Action Comics (DC, 1938 series) #892.