I just want to make sure we are playing these 2 captain Americas cards correctly.
He has 2 cards that give bonuses for each color of hero you have. (Perfect Teamwork and Avengers Assemble)
Do the bonuses only count for heroes in play at the time you play him, or can you play him, then play other types of heroes and give him the total bonus after all heroes are played?
Underlined the key part. You can play those Caps first or last and they'll be worth the same amount of Attack or Recruit (assuming no draw effects). Have means heroes already played from hand and still in your hand both count toward it.
Example in the bottom-right corner of page 16 even uses one of these Caps and heroes both played and still in hand.