'Ant-Man and the Wasp' leaves a dangling plot hanging from the first movie

Spoiler warning: This write-up discusses story points in Ant-Man and the Wasp, currently playing in local cinemas.

Ant-Man and the Wasp fixes the plot hole from Captain America: Civil War, showing in a cheery fashion what happens to superhumans who broke the Sokovia Accords.

However, it still left a dangling subplot from Ant-Man hanging.

Remember Hank Pym's contemporary in the S.H.I.E.L.D, Mitch Carson, who happened to be a Hydra mole? 

In the first movie, Carson was among the buyers of the Pym Particles. Fighting ensued and he took off with the briefcase containing the Pym Particles.

Again, Spoiler Warning.

Carson does not appear in the movie. It seems the Marvel Cinematic Universe has moved on from anything Hydra.

In the comics, Carson was a candidate to be the third Ant-Man, whose suit was stolen by a low-level S.H.I.E.L.D. agent Eric O' Grady, a character co-created by Robert Kirkman of The Walking Dead fame.