When Factor 5 announced that they would be making a Wii game, many of us took guesses as to what it would be. According to Kombo, though, a credible source claims that the game will be a new Kid Icarus title. The rumor also states that Factor 5 will not be using their GameCube graphics engine, and instead will be developing the game from the ground up.
With Pit being a playable character in Brawl (which is likely to increase hype for the Kid Icarus franchise), we wouldn't be surprised if this rumor turned out to be true. Since it is only a rumor though, be sure to take your daily dose of salt with it, perhaps a grain or two.