Back in "Captain America 2: The Winter Soldier," there was an adversary named Brock Rumlow who got it on with Falcon (Anthony Mackie). To recall, both Rumlow and Falcon were in the middle of a confrontation in one of the Hellcarriers before the said aircraft plunged and crashed.

For some reason, Rumlow survived. And while many didn't really pay much attention to it, it seems that it meant something which could somehow explain why Frank Grillo would be re-appearing on "Captain America 3: The Winter Soldier."

With regards to how Rumlow becomes Crossbones is anyone's guess. He may go under a secret identity, don a mask and so on. But one thing is practically certain, Cap has another problem to deal with in Crossbones, someone who was pretty much prominent in the Captain America comic series.

And he practically confirmed that when he made this tweet:

It took another tweet to practically seal the deal. And this happened when Frank Gillo retweeted a blog post from an undisclosed writer with the title "Frank Grillo Returning for Civil War".

Not enough? Well he went on to post a familiar scene from the Captain America comics showing Crossbones battling the First Avenger.

So with all that, it is practically imminent that we will see Rumlow back and with apparent reason to get back at Captain America and maybe even the Falcon since they never really finished off their joust.

Captain America and Iron Man are expected to battle it out as they fight for their sides. Cap is fighting to keep the secret identities of super heroes while Iron Man (Tony Stark) is siding with the government.

Aside from Captain America, Iron Man and Crossbone, a whole lot of popular Marvel Comic heroes are expected to appear in the said movie.

"Captain America 3: Civil War" is set to be released on May 6, 2016.