Inspired by Avengers BC I couldn't help but build up the roster with a few more members.
Avengers BC by Prowl-Ar Nightiger, on Flickr
Archer (Hawkeye) not only invented a new weapon for hunting but she has taken it to a new level since joining the Avengers.
Brute (Beast) isn't at all what he seems. Gifted with great intelligence, strength, and dexterity he is constantly trying to prove that he is more valuable to the Avengers as a thinker than a fighter.
Captain Marvel: A member of the first Kree expeditionary team to explore Earth. Captain Marvel was ordered to remain on the planet to observe until a full science team could arrive, however he decided on his own to interact with the alien species.
Carnivore is a normal human encased in a living suit that is slowly consuming his sanity. While he is a member of the Avengers he really joined the team so that they could stop him if the alien ever gained complete control.
Now for a few other customs:
various heroes by Prowl-Ar Nightiger, on Flickr
With so many people around the world vanishing the remnants of the U.S. Government scrambled to rebuild a super team. Arachnus, formerly known and the Prowler, and Electro were recruited for a special mission to travel into space in order to ascertain whether Iron Man had survived the vanishing. Arachnus is outfitted with a backup Iron Spider Suit while Electro, now a being of living electricity is given a Stark Industries designed contain containment suit allowing him to safely interact with the world around him.
Not much is known about Valor his partner Scarlet Spider other than they hale from the future. The little that is known is that Valor is the son of Flash Thompson and it is speculated that his symbiote suit is either a future version of Venom or a spawn of the Venom suit. It has become rather obvious that they share a true symbiosis as the speak in the singular and when separated the suit shows no inclination of bonding with other subjects. The Scarlet Spider is Valor's guardian and mentor. A Life Model Decoy of Peter Parker the unit's technology is beyond that of all current LMDs. While the two do perform heroic deeds like most super powered heroes other actions have been observed that seem counter productive. It is theorized that these actions are meant to steer the future on a path that only they can foresee.
Finally just for fun adding to my Marvel Swimsuit customs comes Black Panther, Out of the Shadows.