Any idea which Inhuman Malick was referencing as the sole reason for Hydra's existence?
Pretty sure it will be someone from the Marvel universe and not a new character, but I'm at a loss which one.
Since Apocalypse is very much tied to the X-Men, which is mostly hands-off to Disney for the moment, I doubt it's him.
From my Avengers lore, I'm going to take a stab and suggest Kang, (Krang?) the guy from the future who got sent back in time and built the ancient egyptian empire. For a while he was one of their other greatest adversaries.
Of course, there are plenty from the various alien civilizations which could also work. Surprised we haven't seen any Skrull, yet.