For those interested, DC Comics has the following on sale on Comixology.
Generally, they're all a dollar each.
BATMAN #1-38
HARLEY QUINN #1-14
JUSTICE LEAGUE #1-38
ACTION COMICS #1-38
AQUAMAN #1-38
BATGIRL #1-34
BATMAN/SUPERMAN #1-18
CATWOMAN #1-38
DEATHSTROKE (2011) #1-20
DEATHSTROKE (2014) #1-4
DETECTIVE COMICS #1-38
THE FLASH #1-38
GREEN ARROW #1-38
GREEN LANTERN #1-38
SINESTRO #1-9
SUICIDE SQUAD (2011) #1-30
NEW SUICIDE SQUAD #1-6
SUPERMAN #1-37
SUPERMAN/WONDER WOMAN #1-15
TEEN TITANS (2011) #1-30
TEEN TITANS (2014) #1-6
WONDER WOMAN #1-38
SECRET SIX #1
LOBO #1-4
GOTHAM BY MIDNIGHT #1-3
I find it interesting that while most of the 2011 launch titles are included up to #38, Batgirl stops at #34.
Of course, this is just week one, so they may be saving the new direction issues to put on sale the same week as Gotham Academy.