In a video interview with Game Reactor at GDC 2012, Sega's Associate Brand Manager Ben Harborne teased the idea that the company will be bringing Shenmue and Skies of Arcadia, just like it will with an HD version of Jet Grind Radio to be released some time this Summer:
We've got a lot of other exciting stuff coming on, down the pipelines before then... I can tell you definitely, it's gonna be Shenmue... and Skies of Arcadia as well. So those are a couple of our most requested games. I can't say yes or no, but we may be working on them.
I would most certainly appreciate all three of those titles coming to XBLA and PSN. Skies of Arcadia remains one of the last RPGs I haven't played but should and would like to see it upgraded in full HD for my viewing pleasure.