>>109229541IDK, they already announced that the three packs are X-Men, F4 and Marvel Knights. You could slip them as "knights" but it'd be a stretch. The only thing they've got going for them is they are already there essentially, and maybe they could be stand alone.
Assuming each pack is 4 characters (since F4), Cyclops and Colossus, Moon Knight, Punisher, Iceman, Jean Grey, Jessica Jones, Shang-Chi would be my guesses.