Ant-Man news has spread that a certain unexpected villain will be the focus of the film: Darren Cross, who in the comics owns a competitive company to Stark Industries called Cross Tech. The full leak is here:
"Story begins with Scott Lang (Paul Rudd) being a thief and single dad who has fallen on hard times and one day breaks into Hank Pym's apartment and steals the Ant-Man suit.
"The main villain's name is Darren Cross who, in the comics, runs Cross Technological Enterprises, a competitor company for Stark Industries and Oscorp. His cousin is the villain known as Crossfire. It's unknown if this role will be played by Patrick Wilson or Corey Stoll. He will have a suit with a similar feel to Ant-man's but more miltary style, yellow and black in color, and with a tendril-looking apparatus coming off it's back (like with Agent Venom). It's to note that in the comics Cross looks more like a pink Hulk, so there may well be some merging of attributes from other characters for this role or multiple villains at that.
"The Ant-Man suit will be much more elaborate than we've seen so far with the helmet being able to open and close much like Iron Man and an assortment of red lights all over the suit, again in Tron fashion. The helmet eyes will also glow red when closed. It's said to be a much more complex and futuristic suit than we've seen so far.
"Ants (the actual insect) are the main ally and superpower for Ant-Man in the film. Lang will speak to the ants via his helmet, just as in the comics, which is said to be a special element to the overall story."
A yellow and black villain makes us think of one villain from the Marvel & Ant-Man Universe: Yellowjacket! Yellowjacket has been multiple characters, and it would seemingly make sense to have him in the film series: especially since Ant-Man's supervillain Ultron will likely not be in the movie at all.