We might at some point venture back into the world of TWEWY.
A sequel to the popular The World Ends With You was hinted at by Tetsuya Nomura, the game's creative producer.
One of Nomura's recent projects, Kingdom Hearts 3D: Dream Drop Distance, was recently released in Japan. The game featured characters from The World Ends With You. When implementing the characters from The World Ends With You into Kingdom Hearts, they made a change. A voice actress for the character Rhyme was found for Kingdom Hearts 3D "out of consideration of the future of The World Ends With You series."
Nomura went on to say "Regarding The World Ends With You, I can't say anything at present... (laughs). But there probably is something."
These two things do not one hundred percent confirm that development on a sequel is underway, but does hint strongly at the possibility of it being so. Check out our review of the original The World Ends With You here.