Evangeline Lilly, who plays new Wasp Hope van Dyne in the Ant-Man movies, has been making the press rounds in support of the movie’s DVD and Blu-ray release. And she mentioned how she didn’t know that she was going to get dusted — alongside Michael Douglas and Michelle Pfeiffer — in the mid-credits sequence of Ant-Man and the Wasp.
So, they winged it. And they probably got it wrong. And therefor, their reaction scenes were trimmed.
Ultimately, it’s fine. The point of the scene is to get Paul Rudd’s character, Scott Lang, into the Quantum Realm at the end of the movie. We think this will be very important to Avengers 4, because Janet van Dyne (Michelle Pfeiffer) explains to Scott about time vortexes, saying they are bad. But really, we think they will be key to reversing what Thanos (Josh Brolin) pulled off in Avengers: Infinity War.