Hannah here, and with the recent drops, I was considering bringing in Bucky Barnes. I had him here way back, so to make things easier I plan for him to remember being in Goodland. There have been changes and such since he was here, of course, so everyone won't exactly be the same, but at least he'll be past the 'wtf is this place where am I' moment. He'd be coming in post-Endgame. You can find his old app in his journal, assignment, though I do need to make some updates.
I'm open to any and all plots in and out of Marvel kids. :)