...I fail to see how they'd make SotC both an online game and good at the same time. I wouldn't mind a carbon-copy of the original one with better graphics, some more varied gameplay (i.e. include smaller enemies), a story that makes sense without forcing you to first play the entire game before getting to the actual story, and then some other small points.
Online just wouldn't do it. But they (the team that worked on SotC / Ico) have been working on their next title, so an announcement about their current project would be win in any case.