3 huge plot holes
I guess Marvel makes many films in this universe, it either forgets what they did or they think we will forget what they did
First off, the shrinking technology depicted in this movie are impossible. Thats plot hole #1. Plot holes 2 and 3 have to do with Peggy Carter and Howard Stark in the beginning. Peggy died the year or 2 before in the Winter Soldier. And Howard Stark died in the 90s, killed by the Winter Soldier in the early 90s.
Guess they figure we are idiots who don't pay attention to details in their movies