This level is the forth level of this section 4 of 5 of the Justice League Story Missions, and this is a unmissable achievement as it’s for natural story progression.
Level 19 - “Arma-Ghetto Superstar”
*** Spoiler - click to reveal ***This level is very short compared to the main story levels and has no major confusing puzzles to tackle, you have to defeat and then level over.
Destroy Virman Vundabar once he drops down just go upto him and mash 
removing all 6 of his heart health.
Now fly upto the cannon jump into the seat with 
and press to shoot a bolt of energy to end the level.
As soon as the cinematics cut in pop achievement unlocked.
Congratulations
Happy Hunting