Somewhere in my head, Falcon ends up flying a sort of Robotech prototype or something. That'd be fracking awesome! Maybe a bit over the top.
I'd like to see him get involved in some shenanigans and get his telepathic bird powers, or perhaps, instead get access to a number of hawk-like drones that allow him to master recon. I think I'd want him in red and black with the weaponized wings like what we've seen on EMH, useful not just for flight, but for cutting and launching as thrown blades. Call it the Redwing system even.
I'd like to see Falcon play pretty much the same role he played in Cap 2, keep Cap grounded, provide reflective advice and keep things a little lighthearted by being the normal guy in this crazy world. He's still very much a modern military guy, which is why they connect, but modern military isn't suerheroes, and as much as Falcon plays on the edge of that world, he's not about to take on an army of killer robots anytime soon. He's still the everyman. He still jogs and eats breakfast, y'know? He has to go to the bathroom and wigs out when inhuman monstrosities show up.