10 Most Nonsensical Plot Holes In The MCU
6. How Does Ant-Man Keep Changing Size In Endgame?
Avengers: Endgame makes a significant plot point out of the fact that, with the Pyms and Van Dynes dead, the Avengers have a limited supply of Pym particles with which to make the Time Heist happen.
That's why, when Stark screws up getting the Tesseract in 2012, he and Cap have to travel back to Camp Lehigh in the seventies to get more Pym Particles in order to get home.
That being the case, with such a limited supply available how does Lang change size during the Time Heist, and during the huge battle at the end of the movie?
Some people have tried to bridge this plot hole by asserting that simply shrinking to a small size or growing to a massive size uses up less Particles than shrinking to sub-atomic size to make time travel possible.
However, the movie makes it pretty clear that there's no difference between the two. Scott Lang even makes a joke out of it, saying that they have enough spare for two test runs and then fumbling his regulator and shrinking, immediately returning to normal size and saying, "Okay, one test run." It's not like he accidentally went back in time in that scene.
Let's not even mention the fact that, in Ant-Man, Hank Pym specifically tells Lang that Pym Particles work by shrinking the distance between atoms, which would make it physically impossible for them to shrink you to a subatomic size in the first place...