Board Thread:Questions and Answers/@comment-1031724-20161029080114/@comment-27929601-20161123202646

Well, most of them were introduced in Agents of S.H.I.E.L.D, Mister Hyde(I got the name confused earlier) as Calvin Zabo(he is alive but doesn't remember anything), Blackout is Marcus Daniels(he exploded in Darkforce but he was literally made of it so he may be alive) and Blizzard is Donnie Gill(he sank into the ocean covered in ice, fate unknown).

Meanwhile, Melter was introduced in a comic that is actually canon to the MCU, he was taken by the military.