Many Villains Are Pushed In and Out Too Quickly To Care
It’s clear that the Marvel Studios phases in the past had the problem of introducing a big bad only to get rid of them immediately. Just as some examples, remember Red Skull, Whiplash, Vulture, Malekith, Dormammu, Abomination, Ronan the Accuser, Kaecilius, Thunderbolt Ross, Yellowjacket, The Mandarin, Hela, Ego, Mysterio, Justin Hammer/AIM, and Eric Killmonger? They all have one thing in common. Each was a one-off villain, used as a top or main villain for a solo project. Some were used or will be used again in another project, but that was not the design at the time. Sometimes, introducing a one-off character in the villain role is tough.