Fans should not lose hope, however.
A sequel to Kid Icarus: Uprising is not in development or planning stages, says director Masahiro Sakurai.
In an email interview with IGN, when asked "if he and his Project Sora team had created such a rich, lasting universe so that it could easily be returned to in future projects," Sakurai said "If by ‘lasting universe’ you mean to ask if there's a sequel, the answer is no.”
Sakurai further elaborated that the decision was made “because we pushed a lot into the game in order to let people have this short yet deep experience, but the novelty of that would likely grow thin in the next game. For now, my thought is that perhaps we'll see someone else besides me make another Kid Icarus in another 25 years.”
You can read our reviews of Kid Icarus: Uprising here and here.