Originally Posted by BullMcGiveny
^ He gives the not personal line before attacking Cap, so I don't think that is it.
I don't think Brock turns so much as he reveals his true colors.
He probably starts out as kind of a competent agent who Steve could be bros with, but when someone gives the orders, he has no qualms about turning on him.
"I'm going to show you something beautiful, everyone screaming for mercy. You want to protect the world, but you don't want it to change. You're all puppets tangled in strings...Strings...There are no strings on me"- Ultron
GREATEST COMIC BOOK MOVIES OF ALL TIME:
1) Captain America: The Winter Soldier 2) The Dark Knight 3) Spider-Man 2 4) X-Men: Days Of Future Past 5) X-Men: First Class