Grim Fandango on the 3DS.
Imagine! Taking this cult classic title, giving it a slight graphical facelift and making the environments 3D. It would be amazing!
It flopped in sales and is considered an epic fail of gaming because it got high ratings across the board and is considered by many to be one of the best pc games of all time, but it sold like shit. But I think if it were ported to 3DS, given a decent trailer or two, it could sell very well and become a flagship title for the handheld.
I personally would love to return to the land of the dead in 3D
Your views? What games would you like to see return on the 3DS?