A couple things you need to know upfront:
1. In the comics, Yellowjacket was a heroic persona of Hank Pym, but Hank Pym was going through some stuff at the time so he was kind of a dick.
2. Darren Cross died in his second appearance (the second part of a two-part story), but was later brought back to life and had been a recurring part of Ant-Man's recent series. Although he gained Hulk-esque powers in his first story, he's mostly just a businessman.
In the movie Ant-Man (2015), Yellowjacket is a suit Cross designs to sell to governments as a tactical espionage tool that uses Pym particles. He ends up wearing it himself to fight Ant-Man. As you can see, it looks pretty different to the suit from the comics...
...unless you're talking about the suit he finds in Astonishing Ant-Man #12 (September 2016), in which case it's remarkably similar (but not exact by any means).