Bucky getting teamed with some other 'sidekick' sorts like Sam and Rhodey, Misty and Colleen, etc. that don't generally get solos and are usually stuck in the orbits of other characters, could be neat. The most underappreciated (living) founding Avenger, Janet, can be their team financier and nominal leader.
And yes, I picked Misty mostly for the image of two people with bionic arms and guns kicking ass together. Sue me.