Secrets within secrets.
When the SSR partnered with the Army to conduct project Rebirth, they weren't only looking for super soldiers. Unbeknownst to most within the program, a twin project ran. Project Gemini, based on Dr. Erskine's work with Project Rebirth, was designed to provide a support system for the super soldiers. Using the vita rays to enhance natural mutations in the subjects, Project Gemini would create soldiers to work behind and beside those of the super soldier variety.
When Hydra's attack on Project Rebirth ends in the death of Dr. Erskine, Project Gemini also gets shut down, after producing a single viable subject, a young girl named Kerian Underwood. She was supposed to be the support for an entire group of super soldiers, not just one. So when Steve Rogers gets sidelined into the show business, Ky gets reassigned.
Seventy years later, Steve wakes up to a changed world.
Project Gemini is about to be reborn.
(Credits to the artist for the cover photo. I found it on Facebook. I will try to figure out who made it.)