Kenji Hiruta is one of the devs who worked on Skies of Arcadia, and he's extremely eager to work on a sequel. Of course, that's only going to happen if SEGA gives the idea the green light. While SEGA is yet to comment on the matter, fans have spoken up in recent weeks by sharing a wave of support for the idea.
Mr. Hiruta has taken to Twitter to thanks fans for their groundswell of support for a sequel to Skies of Arcadia. Hiruta is now working to collect all of the requests from fans, and will pass them on to SEGA. Hopefully the higher-ups at SEGA see the interest and decide to have the project move ahead.