It wouldn’t be surprising if Marvel ultimately moved on to release four films a year, but that has yet to be confirmed.
The first two Marvel One-Shot films debuted in 2011, The Consultant, which was attached to the home video release of Thor, and A Funny Thing Happened on the Way to Thor’s Hammer, which arrived with Captain America: The First Avenger.
It’s hard to blame Marvel for not putting out any recent One-Shot shorts.
For a period of time, when Marvel fans purchased the latest Marvel Studios film on Blu-ray or DVD, they would get a special treat, in the form of a brand new short film called Marvel One-Shots, named after the One-Shot comics that would tell a singular, contained story.