Microsoft HD remakes that could work with the Nintendo crowd:
Fable
Banjo-Kazooie
Viva Pinata
Rare Replay
You're in the Movies
Dance Central
Lips
Nintendo franchises that could work with the Xbox crowd:
Metroid
Xenoblade
Zelda
Smash Bros
Hyrule Warriors
Mario Kart
F-Zero
Fire Emblem