There are two different First Day Covers with this issue. The main stamps have a Batman FDC with the Batman logo on the reverse and the DC insert. The miniature sheet and prestige stamp book pane FDC has the the Justice League logo on the reverse and Justice League insert.
Batman
from Miniature Sheet
1st
Green Lantern and The Flash
from Miniature Sheet
1st
Wonder Woman
from Miniature Sheet
1st
Superman
from Miniature Sheet
1st
Cyborg and Aquaman
from Miniature Sheet
1st
Supergirl and Shazam!
from Miniature Sheet
1st