Is 'Yellowjacket' The Villain in Marvel's 'Ant-Man' ?

Several days ago Jeff Sneider of The Wrap revealed the roles that both Patrick Wilson and Corey Stoll will be playing in the upcoming Marvel film Ant-Man. According to their sources the villains Darren Cross and his cousin Crossfire will battle Scott Lang (Paul Rudd) in the film.

I'm told Corey Stoll is playing ANT-MAN villain Darren Cross & Patrick Wilson is playing his cousin, who may or may not become Crossfire.
— Jeff Sneider (@TheInSneider) June 19, 2014

Now Badass Digest is reporting that whichever cousin (Stoll or Wilson) is expected to become the cinematic villain version of Yellowjacket. Obviously this is a huge departure from the comics given that Hank Pym was both Ant-Man and eventually Yellowjacket in the comics.