I’m pretty sure Iron Fist was an Avenger for a time. I think around the Civil War time period. Shouldn’t he be buffed in the Earth’s Mightiest Pvp?
Everyone has been an Avenger at some Point. Heck, I Think I was a reserve for about five minutes…
There was a promo handed out at comic shops around '90 that was a blank Avengers Priority Identicard. I still have mine, filled out with my heroic identity. 