Rayderr
Footballguy
I think there's a very good chance that Ward is indeed Hydra, based solely on Joss Whedon. He's not afraid to write off major and recurring characters (usually with death.) in Buffy he killed off Tara, Anya, and Buffy's Mom (Angel and Buffy also died, but they got better). Angel he killed off Doyle, Winnifred, Cordelia and Wesley. Firefly/Serenity saw the deaths of Shepherd and Wash. And there are already rumors of a major death in the next Avengers film.
I get the feel they might want, but they took it so far that it just makes the show look stupid.