Whoa. What a list. I'm starting to feel small and unworthy of making my own list. Well, not really, but that is one heck of a job! You've posted many of my own choices too, and I'll add my reasons for wanting them, for now.
Kate Bishop and Thor Girl: Seriously, if the four male Avengers are being "honored" with their Hydra Four counterparts, I'd like to see a team-up of American Dream, Rescue, Thor Girl, and Kate Bishop.
Silverclaw, Silver Sable, Silver Samurai: If Gaz plans to add more silver heroes other than Spider-Ham, the easiest way is with heroes with "silver" in their name.
Nighthawk, Power Princess and Hyperion: Squadron Supreme please.
Vulture and Deathbird: I'd like to see some aerial combat with either Falcon. Plus we still have no Shi'ar.
Snowbird: More Alpha Flight!