User blog comment:Hufflepuffgirl28/The Whole Captain America Thing/@comment-1894786-20160528173620/@comment-26100657-20160528192701

Yeah, I think it's going to be Kobik. I'm pretty sure it won't be mind control, though, because they confirmed that it definitely won't be that. I think she legitimately changed his entire history, even accidentally. You should read the Captain America: Sam Wilson series where they were foreshadowing the cosmic cube, it's really good.