Let's look at the plot points that we know about:
-The main characters are sent on mission individually as a set up to get rid of them
-They team up and decide to run
-They're being helped by a Congressman/ex assassin
-They encounter a "Superman"
-They fight against normal soldiers
-Most of them met each other in the past
-All of them were introduced in the past
-They're not being freed from prison or injected with bombs.
It's nothing like Suicide Squad.