The Justice League
Cyborg
Shazam
G.L Stewart
Hawkman
Firestorm
Hawkgirl
Creeper
Vs
The Injustice League
Deathstroke
Black Adam
Sinestro
Lex Luthor Armored
Bizarro
Captain Cold
Black Manta
No prep
All are dcnu
The Justice League
Cyborg
Shazam
G.L Stewart
Hawkman
Firestorm
Hawkgirl
Creeper
Vs
The Injustice League
Deathstroke
Black Adam
Sinestro
Lex Luthor Armored
Bizarro
Captain Cold
Black Manta
No prep
All are dcnu
You seem to have shorted the JL a lot of their heavy hitters. Unless he got a big powerup in DCNU, the Creeper is just the north side of useless here.
As for the actual fight:
-Cyborg should have the AoE to take Deathstroke
-John should at least be able to stall Sinestro before others can join in
-Shazam can take Black Adam
-If Nu-Firestorm has the oomph to make blue Kryptonite, that takes care of Bizarro.
-Hawkman and Hawkgirl can probably get Cold and Manta before moving on to Luthor
But that still leaves a lot of holes in the JL's defense that for the League to exploit.