Animal Crossing to 360. Rare develops, and a more active online community helps the fun factor of the game out. Also bump visitors up to 16.
God of War to Wii. Controls change to nunchuck used for left arm attacks and wiimote used for right arm attacks. No more predone attack combos. Combos are created on the fly by intelligently utilising both arm attacks together. I have no idea who should develop it.
N+ to PS3. Give me user created levels.








