Most Images are pretty obvious, we have The Flash from the 90's tv show, CBS's Supergirl and Gorrila Grod. These next ones are the not so obvious...
the Alternate Flash in the Wormhole scene is in all likelihood Conner Hawke , whose heritage is (1/4 Korean, 1/4 African American, 1/2 Caucasian)
the guy you see in the hat is more than likely Jonah Hex based on the scars and civil war style hat.
And the final Mysterious image is of the Legion Ring.
last but not least the Justice league on speed dial.
Eddie = As in Thawne (Meaning he is alive in earth 2) makes you wonder
Bruce = Battman
Hal = Hal Jordan Green Lantern
Diana = Wonder Woman
and that's it Thank You :)