“If by ‘lasting universe’ you mean to ask if there's a sequel, the answer is no 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.” - Masahiro Sakurai

Kind of sad, since KI:U was great, but also seems like a good thing, as they can't make constant sequels and we have another regular franchise.