Board Thread:General Discussion/@comment-33301552-20180202055226/@comment-1038387-20180202110815

Using DPL, I managed to make this list of comics that have appearance tags for all five people in that pic:


 * 52 Vol 1 8
 * DC Comics: The Ultimate Character Guide
 * DC Comics Encyclopedia
 * DC Comics Encyclopedia: Updated and Expanded
 * DC Universe Legacies Vol 1 8
 * Final Crisis: Legion of 3 Worlds Vol 1 1
 * Flash Vol 2 209
 * Flashpoint: Kid Flash Lost Vol 1 3
 * Green Lantern: Rebirth Vol 1 4
 * Green Lantern: Rebirth Vol 1 5
 * Green Lantern: Rebirth Vol 1 6
 * Green Lantern Vol 3 81
 * Guide to the DC Universe Secret Files and Origins Vol 1 2000
 * Infinite Crisis Vol 1 2
 * Infinite Crisis Vol 1 3
 * Infinite Crisis Vol 1 7
 * JLA/Avengers Vol 1 3
 * JLA/Titans Vol 1 2
 * JLA/Titans Vol 1 3
 * JLA: Our Worlds at War Vol 1 1
 * JLA: Welcome to the Working Week
 * JLA: World Without Grown-Ups Vol 1 1
 * JLA: World Without Grown-Ups Vol 1 2
 * JLA Secret Files and Origins Vol 1 3
 * JLA in Crisis Secret Files and Origins Vol 1 1
 * Justice League of America Vol 2 59
 * Sins of Youth: JLA, Jr. Vol 1 1
 * Sins of Youth: Kid Flash and Impulse Vol 1 1
 * Superman/Batman Vol 1 13
 * Superman Secret Files and Origins Vol 1 1
 * Titans/Young Justice: Graduation Day Vol 1 3
 * Wonder Woman Vol 2 210
 * Young Justice: Sins of Youth Secret Files and Origins Vol 1 1
 * Young Justice: Sins of Youth Vol 1 1
 * Young Justice: Sins of Youth Vol 1 2
 * Young Justice 80-Page Giant Vol 1 1
 * Young Justice Vol 1 1000000
 * Young Justice Vol 1 20
 * Young Justice Vol 1 24
 * Young Justice Vol 1 35
 * Young Justice Vol 1 54
 * Young Justice Vol 1 6
 * Zero Hour Vol 1 3

Obviously, it's not from DC Encyclopedia, and several others can also be ruled out. The costumes, art and layout suggest it's from (or concurrent with) or the later part of. Check the summaries; if they don't help, you can look for the comics at Comixology.