6. The body count is enormous, and a BUNCH of main characters die.
Captain Boomerang, TDK, Weasel*, Blackguard, Mongal, and Javelin are all dead in the first 12 minutes, quickly followed by Savant, whose head is exploded by Waller when he tries to run away. Rick Flag and Polka-Dot Man also die near the end of the movie. In the 2016 movie, only Slipknot and Diablo die.
*Weasel appeared to drown at the very beginning of the movie, but he actually survived and no one knows. Long live Weasel!