Because of this specific distinction in wording, I ended up ruling that Falcon could only kick off once per turn, which means I was awarded 4 bonus tokens. 3 for the villains attacked and then just 1 for Falcon. But then I got 3 heals from Spider-Man which definitely prevented 3 actual heroes from dying that very turn so pretty awesome.
You played it correctly. The distinction is *if* vs. *each*.
Game Designer - USAopoly