Well, I'd come in with my black trench coat, my steel-toed boots, a broadsword on my back and two handguns on my belt, hurl Sora into the deepest reaches of space, along with his lame ass Disney friends, put Cloud, Yuffie, Auron, and Leon in my party, later adding Dias, Sephiroth, Vincent, Dante (DMC), MasterChief(Halo),Magus (CT), Vera(KOTORII), and many more. Then I would go in and kick those sorry Heartless asses, leaving nothing but destruction in my wake! All shall feel my wrath!!!!!!

...Or I could just add myself in as a cool side character...Possibly playable...