Im going to say it as many times as necessary... without Manny is not Grim Fandango.
Could possibly be Grim Fandango 2 though. I can only see bringing Manny back ruining one of the best games ever. I found myself sympathising with the guy more then any other character in any game and a large number of films. Bringing him back would inevitably disappoint him, therefore it would disappoint me.