The only thing that comes to mind really (I still have hope for Beyond Good and Evil 2) is Skies of Arcadia 2. I don't know how far they got into making this game but it got rumoured and then I think the team that made it split up and now work on different stuff. I had hope when Vyse, Aika and Fina all turned up in Valkyria Chronicles, but that came to nothing either (other than making the game even more awesome). Shame, I thought that there was a lot to be explored in that world.
There was a rumoured Skies of Arcadia HD re-release too, but again, that never came to anything.
There was a rumoured Skies of Arcadia HD re-release too, but again, that never came to anything.