Who Is The Wasp in Ant-Man?
Who Is The Wasp? Janet van Dyne's Origin Is Full of So Many Twists and Turns
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In 2015's Ant-Man (which differs from the comics in a number of ways), it's mentioned that Janet van Dyne has been stuck in the subatomic universe known as the Quantum Realm for 30 years. Pym isn't willing to give Hope a suit so the Wasp doesn't make a real appearance in that movie. The exception is when Pym is telling Hope the truth about what really happened to her mom.
It's also worth noting that Yellowjacket is the main villain in the film. Corey Stoll plays Darren Cross, Hank's former protégé and CEO of Pym Technologies, a man obsessed with recreating a shrinking suit of his own. Luckily, Scott is able to defeat him by going subatomic and destroying the suit from the inside. After shrinking in between the molecules, Scott successfully comes back, becoming the first to ever do so. This moment opens up a very real possibility of being able to bring Janet back from the quantum realm, something that's explored in Ant-Man and the Wasp.