Looks like the chances of a sequel for The World Ends With You are very good indeed. When Square-Enix's Tetsuya Nomura was asked about Neku's appearance in Kingdom Hearts Dream Drop Distance, he said that we could take that as notice of something to come. If that's not enough, Nomura just flat-out said that something is in the works.

While a sequel or new game in the series wasn't confirmed, it's easy to see that there's definitely something brewing.